347 results on '"Dir"'
Search Results
2. Patterns of failure for recurrent head and neck squamous cell carcinoma treated with salvage surgery and postoperative IMRT reirradiation
- Author
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Mohamed, Abdallah S.R., Martin, Geoffrey V., Ng, Sweet Ping, Takiar, Vinita, Beadle, Beth M., Zafereo, Mark, Garden, Adam S., Frank, Steven J., David Fuller, C., Brandon Gunn, G., Morrison, William H., Rosenthal, David I., Reddy, Jay, Moreno, Amy, Lee, Anna, and Phan, Jack
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- 2024
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- View/download PDF
3. Comparison of Syn T2-FLAIR and Syn DIR with conventional T2-FLAIR in displaying white matter hyperintensities in migraine patients.
- Author
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Liu, Zhen-Zhen, Yu, Hai-Yang, Li, Yuan-Hui, Zhang, Zhi-Cheng, Zhao, Bin-Liang, Zhang, Jie, and Guo, Ruo-Mi
- Abstract
Objective: Young migraine patients often present with white matter hyperintensities (WMHs) on magnetic resonance imaging (MRI). This study aimed to analyze whether synthetic (Syn) T2-FLAIR and Syn double inversion recovery (DIR) can reveal WMHs more clearly and sensitively than conventional T2-FLAIR. Materials and Methods: Conventional MRI and Syn MRI data from 50 young migraine patients were analyzed prospectively. WMHs in each anatomical region (periventricular, deep white matter, and juxtacortical) were recorded separately. The differences in the clarity of lesion boundaries and the number of lesions displayed in the three sequences in the same anatomical region were analyzed. Results: A total of 80 (periventricular area, 15; deep white matter, 31; juxtacortical area, 34), 163 (17, 50, 96), and 134 (18, 42, 74) lesions were observed with conventional T2-FLAIR, Syn T2-FLAIR, and Syn DIR, respectively. Syn T2-FLAIR and Syn DIR can show lesions more clearly than conventional T2-FLAIR (all P < 0.001). There was no significant difference in the number of lesions observed in the periventricular white matter among the three sequences (P = 0.159, 0.083, 0.322). Syn T2-FLAIR and Syn DIR can detect more lesions in the deep white matter than conventional T2-FLAIR (P < 0.001, P = 0.006). Syn T2-FLAIR revealed more lesions in the juxtacortical white matter than Syn DIR and conventional T2-FLAIR imaging (all P < 0.001), and conventional T2-FLAIR revealed the fewest lesions (P < 0.001). Conclusion: Syn T2-FLAIR and Syn DIR sequences can clearly and sensitively detect WMHs, especially in deep and juxtacortical white matter areas. [ABSTRACT FROM AUTHOR]
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- 2025
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4. Systemic Lupus Erythematosus (SLE) Induced by ASIA Syndrome After the Aesthetic Medicine Procedures—A Case Report.
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Knapik, Michalina, Owczarczyk-Saczonek, Agnieszka, Jaśkiewicz, Łukasz, Kuna, Jakub, Chmielewski, Grzegorz, and Krajewska-Włodarczyk, Magdalena
- Subjects
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AUTOIMMUNE hemolytic anemia , *AUTOIMMUNE diseases , *SYSTEMIC lupus erythematosus , *JOINT pain , *JOINT diseases - Abstract
Introduction: The autoimmune/inflammatory syndrome induced by adjuvants (ASIA) is a rare condition caused by an immune response associated with over-reactivity of the immune system, triggered by adjuvants. The most common adjuvants are aluminium salts but can also be bioimplants or infectious agents. It may lead to the development of various autoimmunologic diseases. Case Report: In the following article, we present the case of a 26-year-old woman who developed SLE likely induced by ASIA syndrome after the aesthetic medicine procedures. The patient was admitted because of arthralgia and fever. She also presented with a butterfly-shaped erythema on her face and erythematous and infiltrative skin lesions on the posterior surface of the thighs and buttocks. We performed numerous diagnostic tests, including laboratory tests, immunological tests, imaging diagnostics such as chest X-ray and USG of the abdomen and joints, and the biopsy of the skin lesion on the left thigh. The results of the diagnostic process led us to diagnose SLE. The patient fulfilled the ACR/EULAR 2019 classification criteria of the SLE. Laboratory results also led to the diagnosis of autoimmune haemolytic anaemia. Due to exposure to numerous adjuvants like tattoo ink, hyaluronic acid, and piercing and the development of the delayed inflammatory reaction (DIR) to hyaluronic acid (HAF), the patient also fulfilled the criteria of ASIA. In the treatment process we applied antibiotics, non-steroidal anti-inflammatory drugs (NSAIDs), steroids, hydroxychloroquine, and cyclosporine. The treatment resulted in an improvement in the general condition, resolution of swelling and joint pain, and improvement in skin lesions. Conclusions: ASIA syndrome after bioimplantation is still underdiagnosed, probably due to ignorance or diagnostic difficulties, as symptoms are uncharacteristic and there is no immunological marker for this syndrome. In addition, as in the presented case, it can develop several years after the procedure, and it is difficult for both patient and physician to become aware of the connection. Early diagnosis requires a multidisciplinary approach and may require immunosuppressive treatment in specific cases. [ABSTRACT FROM AUTHOR]
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- 2025
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5. Geometric evaluation and quantifying dosimetric impact of diverse deformable image registration algorithms on abdomen images with biomechanically modeled deformations.
- Author
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Liu, Yilin, Zhang, Pengpeng, Hong, Jun, Alam, Sadegh, Kuo, LiCheng, Hu, Yu‐chi, Lu, Wei, and Cerviño, Laura
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SMALL intestine ,TRANSLATIONAL motion ,VECTOR fields ,MEDICAL dosimetry ,PANCREATIC cancer ,IMAGE registration - Abstract
Purpose: Deformable image registration (DIR) has been increasingly used in radiation therapy (RT). The accuracy of DIR algorithms and how it impacts on the RT plan dosimetrically were examined in our study for abdominal sites using biomechanically modeled deformations. Methods: Five pancreatic cancer patients were enrolled in this study. Following the guidelines of AAPM TG‐132, a patient‐specific quality assurance (QA) workflow was developed to evaluate DIR for the abdomen using the TG‐132 recommended virtual simulation software ImSimQA (Shrewsbury, UK). First, the planning CT was deformed to simulate respiratory motion using the embedded biomechanical model in ImSimQA. Additionally, 5 mm translational motion was added to the stomach, duodenum, and small bowel. The original planning CT and the deformed CT were then imported into Eclipse and MIM to perform DIR. The output displacement vector fields (DVFs) were compared with the ground truth from ImSimQA. Furthermore, the original treatment plan was recalculated on the ground‐truth deformed CT and the deformed CT (with Eclipse and MIM DVF). The dose errors were calculated on a voxel‐to‐voxel basis. Results: Data analysis comparing DVF from Eclipse versus MIM show the average mean DVF magnitude errors of 2.8 ± 1.0 versus 1.1 ± 0.7 mm for stomach and duodenum, 5.2 ± 4.0 versus 2.5 ± 1.0 mm for small bowel, and 4.8 ± 4.1 versus 2.7 ± 1.1 mm for the gross tumor volume (GTV), respectively, across all patients. The mean dose error on stomach+duodenum and small bowel were 2.3 ± 0.6% for Eclipse, and 1.0 ± 0.3% for MIM. As the DIR magnitude error increases, the dose error range increase, for both Eclipse and MIM. Conclusion: In our study, an initial assessment was conducted to evaluate the accuracy of DIR and its dosimetric impact on radiotherapy. A patient‐specific DIR QA workflow was developed for pancreatic cancer patients. This workflow exhibits promising potential for future implementation as a clinical workflow. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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6. Ruling the Borderlands: An Ethnography of the Pakistani State’s Everyday Practices in Dir.
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Liu, Chen, Khan, Usman, Ullah, Shakir, and Badshah, Ikram
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POSTCOLONIALISM , *COLD War, 1945-1991 , *SEPTEMBER 11 Terrorist Attacks, 2001 , *ETHNOLOGY , *MILITARISM , *BORDERLANDS , *PAKISTANIS - Abstract
This article analyses how and why the northwest borderland region of Pakistan has become one of the world’s most heavily militarised regions. Before 9/11, the area was a historical colonial frontier, experiencing significant militarism and violence during the Cold War. After the 9/11 attacks and the American and allied forces’ invasion and occupation of Afghanistan, however, the Pakistani military undertook a massive intervention and deployment in the region and established a chain of checkpoints aimed at filtering and disciplining the local population. Consequently, local inhabitants have endured severe treatment from the military and other coercive apparatuses. Using an ethnographic method, this article documents the daily experiences of the local people amidst pervasive militarisation. It contends that recent instances of state violence and militarisation cannot solely be attributed to 9/11 but are deeply rooted in the region’s historical treatment as a buffer zone during colonial times. In this context, Pakistan’s postcolonial state has heavily relied on its violent methods and securitised infrastructure to regulate both the region and its people. [ABSTRACT FROM AUTHOR]
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- 2024
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7. A Comprehensive Study on Advancements in Document Information Retrieval.
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Sharma, Abhilasha and Arya, Aparna
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ARTIFICIAL neural networks ,INFORMATION retrieval ,RECURRENT neural networks ,CONVOLUTIONAL neural networks ,DEEP learning - Abstract
Using deep learning models like Convolutional Neural Networks (CNN), Recurrent Neural Networks (RNN), Deep Neural Networks (DNN), and Random Multimodel Deep Learning (RMDL), this review paper provides an extensive examination of Document Information Retrieval (DIR). The study carefully analyses and assesses the accuracy of these individual models and ensemble strategies in DIR tasks, drawing on a close reading of more than 25 research papers. [ABSTRACT FROM AUTHOR]
- Published
- 2024
8. Reversal of Dopamine D2 Agonist-Induced Inhibition of Ventral Tegmental Area Neurons by Gq-Linked Neurotransmitters Is Dependent on Protein Kinase C, G Protein-Coupled Receptor Kinase, and Dynamin
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Nimitvilai, Sudarat, McElvain, Maureen A., and Brodie, Mark S.
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- 2013
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9. The dual roles of dissimilatory iron reduction in the carbon cycle: The "iron mesh" effect can increase inorganic carbon sequestration.
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Zhao, Cheng, Xun, Fan, Li, Biao, Han, Xiaotong, Liu, Huan, Du, Yingxun, Wu, Qinglong L., and Xing, Peng
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IRON , *CARBON sequestration , *CARBON dioxide mitigation , *CARBON cycle , *LAKE sediments , *ELECTRON transport , *CARBONACEOUS aerosols - Abstract
Dissimilatory iron reduction (DIR) can drive the release of organic carbon (OC) as carbon dioxide (CO2) by mediating electron transfer between organic compounds and microbes. However, DIR is also crucial for carbon sequestration, which can affect inorganic‐carbon redistribution via iron abiotic–phase transformation. The formation conditions of modern carbonate‐bearing iron minerals (ICFe) and their potential as a CO2 sink are still unclear. A natural environment with modern ICFe, such as karst lake sediment, could be a good analog to explore the regulation of microbial iron reduction and sequential mineral formation. We find that high porosity is conducive to electron transport and dissimilatory iron‐reducing bacteria activity, which can increase the iron reduction rate. The iron‐rich environment with high calcium and OC can form a large sediment pore structure to support rapid DIR, which is conducive to the formation and growth of ICFe. Our results further demonstrate that the minimum DIR threshold suitable for ICFe formation is 6.65 μmol g−1 dw day−1. DIR is the dominant pathway (average 66.93%) of organic anaerobic mineralization, and the abiotic‐phase transformation of Fe2+ reduces CO2 emissions by ~41.79%. Our findings indicate that as part of the carbon cycle, DIR not only drives mineralization reactions but also traps carbon, increasing the stability of carbon sinks. Considering the wide geographic distribution of DIR and ICFe, our findings suggest that the "iron mesh" effect may become an increasingly important vector of carbon sequestration. [ABSTRACT FROM AUTHOR]
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- 2024
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10. Micromorphological and phytochemical profiling of Delphinium suave Huth. from Hindukush range, Lower Dir Khyber Pakhtunkhwa Pakistan.
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Ahmad, Imran and Dastagir, Ghulam
- Abstract
This is a very first attempt to study various parameters of a medicinal plant, Delphinium suave Huth. The plant is erect, geophytic, herbaceous, with tuberous root, trifid in a palmatipartite, strigose cuneate leaf and white spurred zygomorphic flower. The root was isodiametric phellem with single non‐glandular trichomes. The stem revealed single‐layered cuticle, multiseriate epidermis, cortex, pith ray and uniserate bowed non‐glandular trichomes. The leaf was amphistomatic, showed tapering trichomes, prismatic crystals and ranunculaceous stomata with circumference 144.66–182.67 μm. Pollen grains in Light Microscopy (LM), were prolate, spheroidal trizonocolpate, isopolar, radiosymmetric, scabrate, elliptic and monads. Scanning Electron Microscope (SEM) pollen surface was scabrate, monad, size varied from 18.06 to 16.67 μm, colpus to inaperturate, tricolpate, ornamented, echinus, isopolar, isodiametric and circular. SEM roots showed sclerenchymatic tissues, stellate, glandular, non‐glandular trichomes and crystals. The stem showed scalariform, pitted vessels, warty protuberances, unicellular, silicified, non‐glandular trichomes. Leaves powder revealed, simple, unicellular, tapered headed, uniseriate, sessile, capitate, unbranched glandular, non‐glandular, trichomes with crystals. Capitate, stellate, circular, unicellular, branchy trichomes were observed for the first time through SEM. Powder drug study of root, stem leaves through LM revealed different tissues. Preliminary phytochemical revealed alkaloids, anthocyanins, anthraquinones, coumarins, flavones, mucilages, saponins, steroids, terpenoids, volatile oils and proteins. GC/MS showed 36 compounds in roots, 33 in stem while 40 in leaves. Fluorescence analysis of roots, stem and leaves showed variations in color when treated with chemicals. This study will assist pharmacognostic exploration, authentication from adulterants/allied species for consistent quality, resulting in safe use, preservation and efficacy. Research Highlights: This was first attempt on pharmacognostic study on D. suave Huth. which could be used as a foundation for identifying and authenticating the specie from other allied species by these morphological, anatomical, GC/MS profiling, phytochemical analysis and fluorescence analysis. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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11. The added value of double inversion recovery (DIR) sequence compared to fluid attenuation inversion recovery (FLAIR) in identifying multiple sclerosis lesions and different cortical subtypes
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Mohamed Mohamed Anwar Mohamed, Ahmed Mostafa Mohamed, Kareem Ahmed Abdelaziz Sabry, and Khaled Sayed Ahmed
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multiple sclerosis ,flair ,dir ,cortical lesions ,Medicine ,Neurology. Diseases of the nervous system ,RC346-429 - Abstract
Background. There is a rising concern about multiple sclerosis (MS) lesions that occur in the cortical gray matter (GM), owing to its direct relationship with the disability and cognition dysfunction that occur during the MS course. Two magnetic resonance imaging (MRI) sequences that aid in the precise identification of these lesions are the Double Inversion Recovery (DIR) and Fluid Attenuation Inversion Recovery (FLAIR) sequences. Objective. To study the importance of the DIR for brain lesion detection and the various cortical subtypes distinction in MS-diagnosed patients and its correlations to the level of patient disability by comparing it to FLAIR. Patients and Methods: Thirty MS patients participated in this retrospective cross-sectional study, who had been previously diagnosed with MS and were routinely followed up at the Radiology Department at Ain-Shams University. Results. Comparing the DIR sequence to FLAIR, the overall MS lesion detection enhanced by 8% (p
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- 2023
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12. Fresh records on Ichthyofaunal diversity of River Panjkora Dir, Khyber Pakhtunkhwa, Pakistan
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Mohsin Ullah Mohsin and Ali Muhammad Yousafzai
- Subjects
ichthyofaunal diversity ,River Panjkora ,Dir ,Science ,Biology (General) ,QH301-705.5 ,Zoology ,QL1-991 ,Botany ,QK1-989 - Abstract
Abstract This study was designed to assess the ichthyofaunal diversity of River Panjkora, Khyber Pakhtunkhwa, Pakistan. For this purpose, a total of 1189 fish from six different sites were collected along the river and identified using standard keys. The fish collected and identified were representing 38 species, belonging to 7 families. The investigation spanned a year, from July 2021 to May 2022. The most dominant family was Cyprinidae 76% (n=906/1189), followed by Nemacheilidae 5.8% (n=69/1189), Channidae 5.2% (n=62/1189), Sisoridae 5.1% (n=61/1189), Mastacembelidae 4.9% (n=58/1189), Salmonidae 2.6% (n=31/1189) and least was Bagridae 0.17 (n=2/1189). The most abundant speices was Schizothorax plagiostomus with relative density of 16.8. Family Cyprinidae was represented by 21 species, Sisoridae by 7 species, Nemacheilidae by 5 species, Channidae by 2 species, while Bagridae, Salmonidae and Mastacembelidae, were each represented by a single species. PAST 3, XLSTAT and EXCEL 2019 were used for principal component analysis to study correlation of fish diversity and richness. Eigenvalue obtained from Kumrat to Busaq were 3.32, 1.01, 0.80, 0.44, 0.31 and 0.10 respectively. The higher value at Kumrat shows higher diversity. The water quality assessment showed average value of water temperature 10.4 ͦC, pH 7.0, electrical conductivity 184 mg/L, dissolved oxygen 7.9 mg/L, turbidity 43.73 mg/L, total dissolved solids 101 mg/L, total suspended solids 34.72 mg/L, total solids 135.53 mg/L, total alkalinity 75.77 mg/L, total hardness 58.37 mg/L, ammonia 0.46 mg/L, sulphate 26.03 mg/L, chloride 14.67 mg/L, calcium 69.11 mg/L, chromium 0.18 mg/L, copper 0.03, cobalt mg/L 0.04, nickel 0.039 mg/L, lead 0.02 mg/L and Zinc 0.35 mg/L. The findings of this study indicated that most of the physicochemical parameters remained within the acceptable limits throughout the study period. Analysis of fish gut contents included; nymphs, insect larvae, the presence of algae, protozoans and macroinvertebrates in the river ecosystem.
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- 2024
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13. Technical Note: Novel imaging method to obtain gray matter-attenuated inversion recovery image using low-field magnetic resonance imaging systems.
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Sakoda, K. and Baba, S.
- Abstract
The double inversion recovery (DIR) technique suppresses two types of tissue signals with different T1 values by applying two inversion recovery (IR) pulses with different inversion times (TI). In contrast, the double tissue suppression with multi-echo acquisition and single TI combining HIRE (DOMUST-HIRE) method, is a technique enabling the white-matter-attenuated inversion recovery (WAIR) images by setting one inversion time (TI) in a sequence based on the multi-echo method and subtracting the second echo image from the first echo image. Here, we propose a new sequence that can provide the gray-matter-attenuated inversion recovery image based on the DOMUST-HIRE method. In this small clinical study, we performed determination of optimal TI and physical evaluation by imaging a subject's head with T1WI and our proposed method for GAIR images. Our proposed method could increase the contrast ratio and the contrast-to-noise ratio between white matter (WM) and gray matter (GM), whereas the signal-to-noise ratio WM and GM decreased than with T1WI method. Our proposed method can be used to suppress GM and CSF signals. The use of our proposed method in low-field MRI systems could provide GAIR image. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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14. On the Sensitivity of Potential Evapotranspiration in Egypt to Different Dynamical Downscaling Options and Boundary Layer Schemes Using a High-Resolution Regional Climate Model †.
- Author
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Anwar, Samy Ashraf and Srivastava, Ankur
- Subjects
EVAPOTRANSPIRATION ,DOWNSCALING (Climatology) ,BOUNDARY layer (Aerodynamics) ,ATMOSPHERIC models - Abstract
Accurate information on potential evapotranspiration (PET) is mandatory for arid regions (such as Egypt) to assess crop water requirements. Such precision is limited by the dynamical downscaling options and the physical settings used in regional climate models (like the RegCM4). To address these issues, four simulations were run as part of the current study. The first two simulations take direct (DIR) and one-way nesting (NEST) into account, while the other two use two boundary layer techniques (HOLTSLAG; HOLT) and (the University of Washington; UW). All simulations were driven via an ERA-Interim reanalysis of 1.5 degrees. The simulated PET was evaluated for the high-resolution reanalysis gridded derived product of ERA5-Land (hereafter ERA5). The findings revealed no discernible difference between DIR and NEST regarding global incident solar radiation (RSDS). Also, NEST had a higher mean air temperature (TMP) than DIR. Additionally, UW had a lower TMP than HOLT, but switching between HOLT and UW did not significantly impact the simulated RSDS. Concerning PET, it is neither affected by DIR and NEST nor HOLT and UW. Such results suggest that the RSDS is the main driver in controlling PET variability, followed by TMP. Therefore, by using the DIR downscaling option and UW boundary layer scheme throughout the period of 1990–2020, as recommended by the World Meteorological Organization, the RegCM4 can be used to develop a regional PET map of Egypt. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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15. Cortical ischemic lesions from atrial myxoma as a mimic of disease activity in an RRMS antiCD20-treated patient.
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Boccia, VD, Saitta, L, Inglese, M, and Lapucci, C
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NEUROMYELITIS optica , *MYXOMA , *CENTRAL nervous system diseases , *HEMATOPOIETIC stem cells , *STEM cell transplantation , *MAGNETIC resonance imaging - Abstract
Cortical lesions (CLs) detected with double inversion recovery (DIR) magnetic resonance imaging (MRI) are very helpful in differentiating multiple sclerosis (MS) from other neuroinflammatory diseases of the central nervous system (CNS), that is, neuromyelitis optica spectrum disorders (NMOSDs). Furthermore, CLs are closely related to motor and cognitive impairment. We report a case of a 48-year-old female MS patient who developed several CLs during anti-CD20 therapy. Some CLs disappeared during follow-up MRIs. In the suspicion of a treatment failure, the screening for the autologous hematopoietic stem cell transplant (AHSCT) was performed with the evidence of an atrial myxoma. In MS patients with new CLs, a comorbid ischemic pathology should be considered and carefully investigated. [ABSTRACT FROM AUTHOR]
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- 2023
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16. Genome-wide identification, characterization, evolution and expression analysis of the DIR gene family in potato (Solanum tuberosum).
- Author
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Wenqi Jia, Yuting Xiong, Man Li, Shengli Zhang, Zhongcai Han, and Kuihua Li
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GENE expression ,GENE families ,POTATOES ,PROMOTERS (Genetics) ,ABIOTIC stress ,CHROMOSOMES - Abstract
The dirigent (DIR) gene is a key player in environmental stress response and has been identified in many multidimensional tube plant species. However, there are few studies on the StDIR gene in potato. In this study, we used genome-wide identification to identify 31 StDIR genes in potato. Among the 12 potato chromosomes, the StDIR gene was distributed on 11 chromosomes, among which the third chromosome did not have a family member, while the tenth chromosome had the most members with 11 members. 22 of the 31 StDIRs had a classical DIR gene structure, with one exon and no intron. The conserved DIR domain accounts for most of the proteins in the 27 StDIRs. The structure of the StDIR gene was analyzed and ten different motifs were detected. The StDIR gene was divided into three groups according to its phylogenetic relationship, and 22 duplicate genes were identified. In addition, four kinds of cis-acting elements were detected in all 31 StDIR promoter regions, most of which were associated with biotic and abiotic stress. The findings demonstrated that the StDIR gene exhibited specific responses to cold stress, salt stress, ABA, and drought stress. This study provides new candidate genes for improving potato's resistance to stress. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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17. Evaluating synthetic computed tomography images for adaptive radiotherapy decision making in head and neck cancer
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Caitlin Allen, Adam U. Yeo, Nicholas Hardcastle, and Rick D. Franich
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Adaptive radiotherapy ,Synthetic CT ,Deformable image registration ,DIR ,CBCT ,Medical physics. Medical radiology. Nuclear medicine ,R895-920 ,Neoplasms. Tumors. Oncology. Including cancer and carcinogens ,RC254-282 - Abstract
Background and purpose: Adaptive radiotherapy (ART) decision-making benefits from dosimetric information to supplement image inspection when assessing the significance of anatomical changes. This study evaluated a dosimetry-based clinical decision workflow for ART utilizing deformable registration of the original planning computed tomography (CT) image to the daily Cone Beam CT (CBCT) to replace the need for a replan CT for dose estimation. Materials and methods: We used 12 retrospective Head & Neck patient cases having a ground truth – a replan CT (rCT) in response to anatomical changes apparent in the daily CBCT – to evaluate the accuracy of dosimetric assessment conducted on synthetic CTs (sCT) generated by deforming the original planning CT Hounsfield Units to the daily CBCT anatomy.The original plan was applied to the sCT and dosimetric accuracy of the sCT was assessed by analyzing plan objectives for targets and organs-at-risk compared to calculations on the ground-truth rCT. Three commercial DIR algorithms were compared. Results: For the best-performing algorithms, the majority of dose metrics calculated on the sCTs differed by less than 4 Gy (5.7% of 70 Gy prescription dose). An uncertainty of ±2.5 Gy (3.6% of 70 Gy prescription) is recommended as a conservative tolerance when evaluating dose metrics on sCTs for head and neck. Conclusions: Synthetic CTs present a valuable addition to the adaptive radiotherapy workflow, and synthetic CT dose estimates can be effectively used in addition to the current practice of visually inspecting the overlay of the planning CT and CBCT to assess the significance of anatomical change.
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- 2023
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18. Tree shrew umbilical cord mesenchymal stem cells labeled with the dark red fluorescent dye dir and small animal live imager observation
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Ruan, Guang-ping, Yao, Xiang, Wang, Kai, He, Jie, Pang, Rong-qing, Zhu, Xiang-qing, and Pan, Xing-hua
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- 2022
- Full Text
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19. Profile of Tehreek-e-Nafaz-e Shariat-e-Mohammadi's (TNSM's) Combatants in Post-9/11 Afghanistan:A Socio-Demographic Analysis.
- Author
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Amin, Tariq and Amin, Noor ul
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FAMILY structure ,FAMILY size ,SOCIOECONOMIC factors ,PSYCHOLOGICAL distress ,JIHAD - Abstract
This study examines the profiles of combatants who participated in the post-9/11 Afghan 'jihad' from Dir, Pakistan and explores the associated psychological and economic conditions affecting their families. Using a qualitative approach, data were collected through unstructured interviews and analyzed thematically. The research includes detailed tables profiling combatants based on age, education, sect affiliation, and family structure. Key findings reveal that a majority of combatants were illiterate, unemployed, and affiliated with the Deobandi sect. The study also highlights that most combatants' families remain uncertain about their loved ones' status, leading to unresolved grief and psychological distress. Additionally, the research provides insights into the economic hardships faced by the families, such as high unemployment rates and large family sizes. This comprehensive profiling of combatants, coupled with the examination of family conditions, offers valuable insights into the socio-economic and psychological dimensions of the post-9/11 Afghan Jihad's impact on the local population. [ABSTRACT FROM AUTHOR]
- Published
- 2024
20. On the Sensitivity of Potential Evapotranspiration in Egypt to Different Dynamical Downscaling Options and Boundary Layer Schemes Using a High-Resolution Regional Climate Model
- Author
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Samy Ashraf Anwar and Ankur Srivastava
- Subjects
DIR ,NEST ,HOLT ,regional climate model ,PET ,Engineering machinery, tools, and implements ,TA213-215 - Abstract
Accurate information on potential evapotranspiration (PET) is mandatory for arid regions (such as Egypt) to assess crop water requirements. Such precision is limited by the dynamical downscaling options and the physical settings used in regional climate models (like the RegCM4). To address these issues, four simulations were run as part of the current study. The first two simulations take direct (DIR) and one-way nesting (NEST) into account, while the other two use two boundary layer techniques (HOLTSLAG; HOLT) and (the University of Washington; UW). All simulations were driven via an ERA-Interim reanalysis of 1.5 degrees. The simulated PET was evaluated for the high-resolution reanalysis gridded derived product of ERA5-Land (hereafter ERA5). The findings revealed no discernible difference between DIR and NEST regarding global incident solar radiation (RSDS). Also, NEST had a higher mean air temperature (TMP) than DIR. Additionally, UW had a lower TMP than HOLT, but switching between HOLT and UW did not significantly impact the simulated RSDS. Concerning PET, it is neither affected by DIR and NEST nor HOLT and UW. Such results suggest that the RSDS is the main driver in controlling PET variability, followed by TMP. Therefore, by using the DIR downscaling option and UW boundary layer scheme throughout the period of 1990–2020, as recommended by the World Meteorological Organization, the RegCM4 can be used to develop a regional PET map of Egypt.
- Published
- 2023
- Full Text
- View/download PDF
21. Short T2 imaging using a 3D double adiabatic inversion recovery prepared ultrashort echo time cones (3D DIR‐UTE‐Cones) sequence
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Ma, Ya‐Jun, Zhu, Yanchun, Lu, Xing, Carl, Michael, Chang, Eric Y, and Du, Jiang
- Subjects
Engineering ,Biomedical Engineering ,Clinical Research ,Biomedical Imaging ,Musculoskeletal ,Achilles Tendon ,Adult ,Algorithms ,Computer Simulation ,Cortical Bone ,Humans ,Image Interpretation ,Computer-Assisted ,Magnetic Resonance Imaging ,Male ,Patella ,Phantoms ,Imaging ,Signal Processing ,Computer-Assisted ,Tarsal Bones ,ultrashort echo time ,Cones ,DIR ,cortical bone ,tendon ,Nuclear Medicine & Medical Imaging ,Biomedical engineering - Abstract
PurposeTo investigate high contrast imaging of short T2 tissues with a three-dimensional double adiabatic inversion recovery prepared ultrashort echo time Cones (3D DIR-UTE-Cones) sequence.MethodsThe sequence used two sequential adiabatic inversion pulses to suppress signals from long T2 tissues, followed by multispoke UTE acquisition to detect signals from short T2 tissues. The two adiabatic inversion pulses are identical with a center frequency located at the water peak, but the spectral width is broad enough to cover both water and fat frequencies. The feasibility of this technique was demonstrated through numerical simulation and phantom studies. Finally, DIR-UTE-Cones was applied to three healthy volunteers to image cortical bone, patellar tendon, and Achilles tendon. T2* was also measured via single-component exponential fitting.ResultsNumerical simulation suggests that the DIR technique provides perfect nulling of muscle and fat as well as efficient suppression of other long T2 tissues with T1 values between fat and water or those above water. Excellent image contrast can be achieved with DIR-UTE-Cones for the short T2 tissues, with fitted T2* values of 0.28-0.38 ms for cortical bone, 0.56 ± 0.07 ms for the patella tendon, and 0.45 ± 0.06 ms for the Achilles tendon, respectively.ConclusionThe 3D DIR-UTE-Cones sequence provides robust suppression of long T2 tissues and allows selective imaging as well as T2* measurement of short T2 tissues such as cortical bone, patellar tendon, and the Achilles tendon. Magn Reson Med 79:2555-2563, 2018. © 2017 International Society for Magnetic Resonance in Medicine.
- Published
- 2018
22. Promote Intratumoral Drug Release and Penetration to Counteract Docetaxel‐Induced Metastasis by Photosensitizer‐Modified Red Blood Cell Membrane‐Coated Nanoparticle.
- Author
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Wu, Ting, Lang, Tianqun, Zheng, Chao, Yan, Wenlu, Li, Yu, Zhu, Runqi, Huang, Xin, Xu, Huae, Li, Yaping, and Yin, Qi
- Subjects
- *
ERYTHROCYTES , *NANOPARTICLES , *PRODRUGS , *CELL death , *TRIPLE-negative breast cancer , *PHOTOTHERMAL effect , *DRUG delivery systems - Abstract
The red blood cell membrane (RBCm) provides tight protection, lowers the immunogenicity, and prolongs the circulation time of drugs in vivo when acting as the coating of drug delivery systems. However, the cellular uptake and release of drugs are hindered by RBCm. Docetaxel (DTX) is the first‐line medicine for treating triple‐negative breast cancer (TNBC), but it induces tumor metastasis. To solve these dilemmas, in this study, the photosensitizer 1,1‐dioctadecyl‐3,3,3,3‐tetramethylindotricarbocyanine iodide (DiR)‐modified RBCm (DM) is prepared, which is coated onto a hybrid micelle consisting of the prodrugs of DTX and the anti‐metastasis agent calcitriol (CTL), obtaining a nanoparticle, named HDC‐DM. In a 4T1 tumor‐bearing mouse model, after injecting HDC‐DM, the intratumoral DTX and CTL concentrations are increased by 1.7 and 2.5 times compared with the free drug groups. After irradiating tumors with near‐infrared laser, DiR elicits the photothermal effect, triggering the rupture of RBCm and drug release, promoting drug penetration in tumors, and inducing immunogenic cell death. The tumor growth inhibition rate is 77%, and the formation of lung metastases is reduced by 82%, with good biocompatibility. It is suggested that the combination of phototherapy, chemotherapy, and anti‐metastatic therapy using HDC‐DM is expected to be a powerful strategy for treating TNBC. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
23. On the exact analytical formula for dimensionless injection rate in CO2 storage based on Special Trans Functions Theory.
- Author
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Perovich, Slavica M and Kovač, Nataša
- Abstract
In this article, Special Trans Functions Theory (STFT) is used to obtain exact solutions of the transcendental equation that describes Dimensionless Injection Rate (DIR) for CO 2 storage. The obtained results were compared with DIR values calculated by a sequential asymptotic formula (SAF) based on the Lambert W function. The proposed exact analytical approach to determining DIR solutions implies considerable qualitative improvement compared to the conventional analytical and numerical methods. Determining STFT DIR solution for CO 2 storage is novel and precise, while the computations are simple, practical and do not require significant computation time. Note that the formulas derived within STFT in applied physics and engineering domains are characterized by structural robustness and complexity. It is a kind of “genetic characteristic” of STFT formulas, which does not affect the efficiency and simplicity of their applications. This paper additionally analyzes the importance of choosing an exact analytical solution for transcendent functional equations that describe the phenomenon of CO 2 storage, since these above-mentioned nonlinear forms describe many other significantly different physical phenomena. This implies the generalization of STF Theory. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
24. Technology and the 'Fearless Biologists'
- Author
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McGraw, Donald J. and McGraw, Donald J.
- Published
- 2021
- Full Text
- View/download PDF
25. Diagnostic utility of 3D DIR MRI in the estimation of MS lesions overall load with special emphasis on cortical subtypes
- Author
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Ahmed S. Abdelrahman, Nivan Hany Khater, and Mai M. K. Barakat
- Subjects
DIR ,MRI ,MS ,Cortical plaques ,Subtypes ,Medical physics. Medical radiology. Nuclear medicine ,R895-920 - Abstract
Abstract Background A number of magnetic resonance imaging studies have shown that a significant proportion of multiple sclerosis (MS) lesions are located in the cerebral cortex and correlate with the patient's disability level. Double inversion recovery (DIR) has a higher sensitivity to detect cortical lesions and their different types. The aim of our study was to assess the superiority of 3D DIR as compared to FLAIR in detecting the different cortical subtypes and to enhance its role as a test for the clinical disability of the patient. Results The current study included 82 MS patients (60 female and 22 male with mean age of 34.5 ± 8.2 years); 59 cases having relapsing–remitting MS, 5 having secondary progressive MS, and 4 having primary progressive MS, as well as eight clinically isolated syndrome cases, and six radiologically isolated syndrome cases. DIR was superior to FLAIR in MS plaque number detection of cortical plaque-types 1, 2, 3 and 4 with a p value
- Published
- 2022
- Full Text
- View/download PDF
26. A novel long non-coding RNA, DIR, increases drought tolerance in cassava by modifying stress-related gene expression
- Author
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Shi-man DONG, Liang XIAO, Zhi-bo LI, Jie SHEN, Hua-bing YAN, Shu-xia LI, Wen-bin LIAO, and Ming PENG
- Subjects
lncRNA ,RNA-seq ,drought stress ,cassava ,DIR ,Agriculture (General) ,S1-972 - Abstract
Cassava is an important tropical cash crop. Severe drought stresses affect cassava productivity and quality, and cause great economic losses in agricultural production. Enhancing the drought tolerance of cassava can effectively improve its yield. Long non-coding RNAs (lncRNAs) are present in a wide variety of eukaryotes. Recently, increasing evidence has shown that lncRNAs play a critical role in the responses to abiotic stresses. However, the function of cassava lncRNAs in the drought response remains largely unknown. In this study, we identified a novel lncRNA, DROUGHT-INDUCED INTERGENIC lncRNA (DIR). Gene expression analysis showed that DIR was significantly induced by drought stress treatment, but did not respond to abscisic acid (ABA) or jasmonic acid (JA) treatments. In addition, overexpression of the DIR gene enhanced proline accumulation and drought tolerance in transgenic cassava. RNA-seq analysis revealed that DIR preferentially affected drought-related genes that were linked to transcription and metabolism. Moreover, RNA pull-down mass spectrometry analysis showed that DIR interacted with 325 proteins. A protein–protein interaction (PPI) analysis found a marked enrichment in proteins associated with the mRNA export and protein quality control pathways. Collectively, these results suggest that DIR and its interacting proteins that regulate mRNA or protein metabolism are involved in mediating the drought stress response. Thus, regulating DIR expression has potential for improving cassava yield under drought conditions.
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- 2022
- Full Text
- View/download PDF
27. Learning-Based Metal Artifacts Removal in Head CT
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Xie, Shipeng, Chen, Qian, Ceccarelli, Marco, Series Editor, Hernandez, Alfonso, Editorial Board Member, Huang, Tian, Editorial Board Member, Takeda, Yukio, Editorial Board Member, Corves, Burkhard, Editorial Board Member, Agrawal, Sunil, Editorial Board Member, Okada, Hiroshi, editor, and Atluri, Satya N., editor
- Published
- 2020
- Full Text
- View/download PDF
28. Image Exchange in Canada: Examples from the Province of Ontario.
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Nagels, Jason, Wu, Sida, Anderson, Dale, Black, Kate, Nikolajevas, Vidas, and Koff, David
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PRIVACY ,ELECTRONIC data interchange ,MEDICAL information storage & retrieval systems ,DICOM (Computer network protocol) ,DIAGNOSTIC imaging ,SELF-efficacy ,ACCESS to information ,DATA security ,MEDICAL ethics ,MEDICAL records ,ELECTRONIC health records - Abstract
An increased number of healthcare providers across the continuum of care share responsibility for providing treatment and care to the patient. Treatment is often provided at community-based facilities and not necessarily at the hospital that performed the imaging. As a result, there is an increased dependency on readily available access to a patient's longitudinal imaging records. The ways in which diagnostic images and results are exchanged among providers within a patient's circle of care have expanded. This article explores three varieties of image exchange. First, we examine image exchange patterns within a regional Diagnostic Imaging Repository and identify missed sharing opportunities. Secondly, we explore the use of a regional clinical viewer widely used in southwestern Ontario, called ClinicalConnect™, and examine the adoption of the viewer by providers. Finally, the paper provides a high-level look at how patients can leverage patient portals to view their imaging data to empower their healthcare experience. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
29. Genome-Wide Identification and Expression Analysis of Eggplant DIR Gene Family in Response to Biotic and Abiotic Stresses.
- Author
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Zhang, Kaijing, Xing, Wujun, Sheng, Suao, Yang, Dekun, Zhen, Fengxian, Jiang, Haikun, Yan, Congsheng, and Jia, Li
- Subjects
EGGPLANT ,GENE families ,ABIOTIC stress ,DISEASE resistance of plants ,SECONDARY metabolism - Abstract
Dirigent proteins (DIR) play important roles in the biosynthesis of lignins and lignans, defensive responses, secondary metabolism, and disease resistance in plants. The DIR gene family has been identified and studied in many plants. However, the identification of DIR gene family in eggplant has not been conducted yet. Therefore, in this study, based on the available genome information of eggplant, the DIR family genes in eggplant were identified with bioinformatics methods. The expression pattern analyses of eggplant DIR family genes in different organs and stresses were also conducted to understand their biological functions. The results showed that a total of 24 DIR genes were identified in the eggplant, which were divided into three subfamilies (DIR-a, DIR-b/d, and DIR-e). Synteny analysis of DIR genes among eggplant, Arabidopsis, and rice showed that 15 eggplant DIR genes were colinear with 18 Arabidopsis DIR genes, and 16 eggplant DIR genes were colinear with 15 rice DIR genes. Phylogenetic tree analysis showed that 19 pairs of orthologous genes were identified between eggplant and pepper. The cis-acting elements analysis implied that the eggplant DIR genes contained a lot of cis-elements associated with stress and hormone response. The organ-specific expression analysis of eggplant DIR family genes revealed that only the SmDIR3 gene was highly expressed in all the 19 organs of eggplant. Some SmDIR genes, including SmDIR7, SmDIR8, SmDIR11, SmDIR14, SmDIR18, SmDIR19, SmDIR20, and SmDIR23, were not or were lowly expressed in the eggplant organs, while the other eggplant DIR family genes showed an organ-specific expression pattern. Furthermore, 19 of 24 SmDIR genes were differentially expressed in response to abiotic and biotic stresses. 5 SmDIR genes, including SmDIR3, SmDIR5, SmDIR6, SmDIR12, and SmDIR22, were differentially expressed under multiple types of abiotic and biotic stresses. Especially notable, the SmDIR22 gene was differentially expressed under three types of abiotic stresses and two types of biotic stresses, which indicated that the SmDIR22 gene plays an important role in the response to abiotic and biotic stresses. These results provide valuable evidence for a better understanding of the biological role of DIR genes in eggplant. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
30. Evaluation of the relationship between the range of radiation-induced lung injury on CT images after IMRT for stage I lung cancer and dosimetric parameters
- Author
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Tomohiro Itonaga, Shinji Sugahara, Ryuji Mikami, Tatsuhiko Saito, Takafumi Yamada, Masahiko Kurooka, Sachika Shiraishi, Mitsuru Okubo, and Kazuhiro Saito
- Subjects
IMRT ,RILI ,DVH ,NSCLC ,DIR ,stage I ,Medicine - Abstract
AbstractBackground This study evaluated the correlation between radiation-induced lung injury (RILI) and dosimetric parameters on computed tomography (CT) images of stage I non-small cell lung cancer (NSCLC) patients undergoing intensity-modulated radiotherapy (IMRT).Materials and methods Sixty-three stage I NSLC patients who underwent IMRT were enrolled in the study. The patients underwent CT within 6 months (acute phase) and 1.5 years (late phase) after radiotherapy. These were fused with the planned irradiation CT. The range of RILI was measured from 10% to 100%, with an IC in 10% increments.Results The median interval from completion of radiotherapy to acute and late phase CT was 92 and 440 days, respectively. The median RILI ranges of the acute and late phases were in the 80% (20–100%) and 70% dose regions (20–100%), respectively. The significantly narrower range of RILI when lung V20 in the acute phase was less than 19.2% and that of V5 in the late phase was less than 27.6% at the time of treatment planning.Conclusions This study showed that RILI occurred in a localized range in stage I NSCLC patients who underwent IMRT. The range of RILI was correlated with V20 in the acute phase and V5 in the late phase.KEY MESSAGESRILI correlated with V20 in acute and V5 in late phase.The shadow of RILI occurred in 80% dose region in acute and 70% in late phase.No relationship exists between radiographic changes in RILI and PTV volume.
- Published
- 2021
- Full Text
- View/download PDF
31. Tree Shrew Umbilical Cord Mesenchymal Stem Cells Labeled with the Dark Red Fluorescent Dye DIR and Small Animal Live Imager Observation.
- Author
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Guang-ping Ruan, Xiang Yao, Kai Wang, Jie He, Rong-qing Pang, Xiang-qing Zhu, and Xing-hua Pan
- Subjects
- *
MESENCHYMAL stem cells , *UMBILICAL cord , *FLUORESCENT dyes , *SHREWS , *STEM cell transplantation , *CORD blood - Abstract
Background: Umbilical cord mesenchymal stem cell transplantation can treat metabolic syndrome, but the tracing of cells in the body after transplantation has always been a problem. Tree shrew umbilical cord mesenchymal stem cells were labeled with the dark red fluorescent dye DIR and a metabolic syndrome model in tree shrew was generated. The migration, distribution, colonization and survival of the cells were observed. Methods: Tree shrew umbilical cord mesenchymal stem cells were labeled with the dark red fluorescent dye DIR. Three days after the tree shrew model was generated, the pancreas, kidney and liver were placed in a small animal live imager to observe the distribution of the labeled cells. Result: The labeled cells showed deep red fluorescence in the live imager. After treatment with the transplanted cells, dark red fluorescent signals were observed in the liver, kidney and pancreas of the tree shrews but not in the untreated group and no dark red fluorescent signal was observed in the cell distribution. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
32. Comparative study between double inversion recovery (DIR) and fluid-attenuated inversion recovery (FLAIR) MRI sequences for detection of cerebral lesions in multiple sclerosis
- Author
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Shaima Fattouh Elkholy, Marianne Abdallah Sabet, Mohammad Edrees Mohammad, and Ramy Edward Ibrahim Asaad
- Subjects
Multiple sclerosis ,MRI ,FLAIR ,DIR ,Cortical lesions ,White matter ,Medical physics. Medical radiology. Nuclear medicine ,R895-920 - Abstract
Abstract Background Multiple sclerosis (MS) is a common chronic inflammatory demyelinating disorder more common in young adults. MS is characterized mainly with white matter (WM) affection; however, considerable gray matter (GM) involvement is also noted in many patients. MRI is used for diagnosis and follow up of the disease using different pulse sequences; FLAIR imaging provides the highest sensitivity in the detection of supratentorial, juxtacortical, and the periventricular lesions but is less sensitive in the posterior fossa. A double inversion recovery (DIR) pulse sequence was recently introduced to improve the visibility of GM lesions and especially cortical lesions. The aim of this study is to assess the role of DIR sequence in the detection of brain lesions in patients with MS compared to FLAIR sequence. Results DIR showed a significantly higher number of MS lesions in infratentorial region (2.9 ± 0.4 compared to 2.25 ± 0.3 in FLAIR) with a statistically significant difference (p = 0.002) and also in supratentorial periventricular regions (11.84 ± 8.07 in DIR and 11.31 ± 8.07 in FLAIR, p < 0.001). DIR imaging also demonstrated significantly more intracortical lesions (7.12 ± 1.2 compared to 1.4 ± 0.9 in FLAIR imaging) with a statistically significant difference (p < 0.001). On the other hand, corpus callosum lesions were significantly higher on FLAIR (0.84 ± 0.1) with respect to DIR imaging (0.68 ± 0.1) with a statistically significant difference in between (p = 0.025). Conclusion DIR is a powerful conventional MRI sequence for visualization of brain lesions in patients with MS and is superior to FLAIR sequence in detecting lesions in different locations, namely cortical, periventricular, and infratentorial regions; hence, DIR can be added to the MRI protocol of MS patients or even can replace FLAIR which would be of a good diagnostic value with only 80 s added to the scan time.
- Published
- 2020
- Full Text
- View/download PDF
33. Diagnostic utility of 3D DIR MRI in the estimation of MS lesions overall load with special emphasis on cortical subtypes.
- Author
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Abdelrahman, Ahmed S., Khater, Nivan Hany, and Barakat, Mai M. K.
- Abstract
Background: A number of magnetic resonance imaging studies have shown that a significant proportion of multiple sclerosis (MS) lesions are located in the cerebral cortex and correlate with the patient's disability level. Double inversion recovery (DIR) has a higher sensitivity to detect cortical lesions and their different types. The aim of our study was to assess the superiority of 3D DIR as compared to FLAIR in detecting the different cortical subtypes and to enhance its role as a test for the clinical disability of the patient. Results: The current study included 82 MS patients (60 female and 22 male with mean age of 34.5 ± 8.2 years); 59 cases having relapsing–remitting MS, 5 having secondary progressive MS, and 4 having primary progressive MS, as well as eight clinically isolated syndrome cases, and six radiologically isolated syndrome cases. DIR was superior to FLAIR in MS plaque number detection of cortical plaque-types 1, 2, 3 and 4 with a p value < 0.001. DIR was superior to FLAIR for detection of overall cortical types, juxtacortical and juxtacortical extended MS plaques with p = < 0.001, 0.010 and < 0.001, respectively. DIR was significantly better than FLAIR for MS plaque number detection in the periventricular white matter, subcortical white matter, infratentorial region and the overall MS plaques burden with a p < 0.001, 0.038, < 0.001, < 0.001, respectively. No significant difference was noted between both sequences for plaques number detection in deep white matter and deep gray matter. A significant correlation between MS disease duration, number of attacks and EDSS and the overall cortical MS plaques types and the overall MS plaque burden. Conclusion: 3D DIR is a reliable tool and provides superior delineation in detecting cortical subtypes. In addition, DIR is of value in assessing the degree of clinical and cognitive impairment of MS affected patients. [ABSTRACT FROM AUTHOR]
- Published
- 2022
- Full Text
- View/download PDF
34. Evaluation of the relationship between the range of radiation-induced lung injury on CT images after IMRT for stage I lung cancer and dosimetric parameters.
- Author
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Itonaga, Tomohiro, Sugahara, Shinji, Mikami, Ryuji, Saito, Tatsuhiko, Yamada, Takafumi, Kurooka, Masahiko, Shiraishi, Sachika, Okubo, Mitsuru, and Saito, Kazuhiro
- Subjects
MEDICAL dosimetry ,COMPUTED tomography ,LUNG cancer ,LUNG injuries ,INTENSITY modulated radiotherapy - Abstract
This study evaluated the correlation between radiation-induced lung injury (RILI) and dosimetric parameters on computed tomography (CT) images of stage I non-small cell lung cancer (NSCLC) patients undergoing intensity-modulated radiotherapy (IMRT). Sixty-three stage I NSLC patients who underwent IMRT were enrolled in the study. The patients underwent CT within 6 months (acute phase) and 1.5 years (late phase) after radiotherapy. These were fused with the planned irradiation CT. The range of RILI was measured from 10% to 100%, with an IC in 10% increments. The median interval from completion of radiotherapy to acute and late phase CT was 92 and 440 days, respectively. The median RILI ranges of the acute and late phases were in the 80% (20–100%) and 70% dose regions (20–100%), respectively. The significantly narrower range of RILI when lung V20 in the acute phase was less than 19.2% and that of V5 in the late phase was less than 27.6% at the time of treatment planning. This study showed that RILI occurred in a localized range in stage I NSCLC patients who underwent IMRT. The range of RILI was correlated with V20 in the acute phase and V5 in the late phase. RILI correlated with V20 in acute and V5 in late phase. The shadow of RILI occurred in 80% dose region in acute and 70% in late phase. No relationship exists between radiographic changes in RILI and PTV volume. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
35. Genome-Wide Identification and Expression Analysis of Eggplant DIR Gene Family in Response to Biotic and Abiotic Stresses
- Author
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Kaijing Zhang, Wujun Xing, Suao Sheng, Dekun Yang, Fengxian Zhen, Haikun Jiang, Congsheng Yan, and Li Jia
- Subjects
eggplant ,DIR ,gene family ,bioinformatics ,expression analysis ,Plant culture ,SB1-1110 - Abstract
Dirigent proteins (DIR) play important roles in the biosynthesis of lignins and lignans, defensive responses, secondary metabolism, and disease resistance in plants. The DIR gene family has been identified and studied in many plants. However, the identification of DIR gene family in eggplant has not been conducted yet. Therefore, in this study, based on the available genome information of eggplant, the DIR family genes in eggplant were identified with bioinformatics methods. The expression pattern analyses of eggplant DIR family genes in different organs and stresses were also conducted to understand their biological functions. The results showed that a total of 24 DIR genes were identified in the eggplant, which were divided into three subfamilies (DIR-a, DIR-b/d, and DIR-e). Synteny analysis of DIR genes among eggplant, Arabidopsis, and rice showed that 15 eggplant DIR genes were colinear with 18 Arabidopsis DIR genes, and 16 eggplant DIR genes were colinear with 15 rice DIR genes. Phylogenetic tree analysis showed that 19 pairs of orthologous genes were identified between eggplant and pepper. The cis-acting elements analysis implied that the eggplant DIR genes contained a lot of cis-elements associated with stress and hormone response. The organ-specific expression analysis of eggplant DIR family genes revealed that only the SmDIR3 gene was highly expressed in all the 19 organs of eggplant. Some SmDIR genes, including SmDIR7, SmDIR8, SmDIR11, SmDIR14, SmDIR18, SmDIR19, SmDIR20, and SmDIR23, were not or were lowly expressed in the eggplant organs, while the other eggplant DIR family genes showed an organ-specific expression pattern. Furthermore, 19 of 24 SmDIR genes were differentially expressed in response to abiotic and biotic stresses. 5 SmDIR genes, including SmDIR3, SmDIR5, SmDIR6, SmDIR12, and SmDIR22, were differentially expressed under multiple types of abiotic and biotic stresses. Especially notable, the SmDIR22 gene was differentially expressed under three types of abiotic stresses and two types of biotic stresses, which indicated that the SmDIR22 gene plays an important role in the response to abiotic and biotic stresses. These results provide valuable evidence for a better understanding of the biological role of DIR genes in eggplant.
- Published
- 2022
- Full Text
- View/download PDF
36. Pre- and post-contrast three-dimensional double inversion-recovery MRI in human glioblastoma
- Author
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Harris, Robert J, Cloughesy, Timothy F, Pope, Whitney B, Godinez, Sergio, Natsuaki, Yutaka, Nghiemphu, Phioanh L, Meyer, Heiko, Paul, Dominik, Behbahanian, Yalda, Lai, Albert, and Ellingson, Benjamin M
- Subjects
Biomedical and Clinical Sciences ,Oncology and Carcinogenesis ,Brain Disorders ,Rare Diseases ,Neurosciences ,Brain Cancer ,Clinical Research ,Cancer ,Biomedical Imaging ,Brain Neoplasms ,Contrast Media ,Disease Progression ,Glioblastoma ,Humans ,Image Enhancement ,Image Processing ,Computer-Assisted ,Imaging ,Three-Dimensional ,Magnetic Resonance Imaging ,Neoplasm Recurrence ,Local ,Prognosis ,Double inversion-recovery ,DIR ,MRI ,Multiparametric MRI ,Oncology & Carcinogenesis ,Oncology and carcinogenesis - Abstract
Fluid attenuated inversion recovery (FLAIR) MRI sequences have become an indispensible tool for defining the malignant boundary in patients with brain tumors by nulling the signal contribution from cerebrospinal fluid allowing both regions of edema and regions of non-enhancing, infiltrating tumor to become hyperintense on resulting images. In the current study we examined the utility of a three-dimensional double inversion recovery (DIR) sequence that additionally nulls the MR signal associated with white matter, implemented either pre-contrast or post-contrast, in order to determine whether this sequence allows for better differentiation between tumor and normal brain tissue. T1- and T2-weighted, FLAIR, dynamic susceptibility contrast (DSC)-MRI estimates of cerebral blood volume (rCBV), contrast-enhanced T1-weighted images (T1+C), and DIR data (pre- or post-contrast) were acquired in 22 patients with glioblastoma. Contrast-to-noise (CNR) and tumor volumes were compared between DIR and FLAIR sequences. Line profiles across regions of tumor were generated to evaluate similarities between image contrasts. Additionally, voxel-wise associations between DIR and other sequences were examined. Results suggested post-contrast DIR images were hyperintense (bright) in regions spatially similar those having FLAIR hyperintensity and hypointense (dark) in regions with contrast-enhancement or elevated rCBV due to the high sensitivity of 3D turbo spin echo sequences to susceptibility differences between different tissues. DIR tumor volumes were statistically smaller than tumor volumes as defined by FLAIR (Paired t test, P = 0.0084), averaging a difference of approximately 14 mL or 24 %. DIR images had approximately 1.5× higher lesion CNR compared with FLAIR images (Paired t test, P = 0.0048). Line profiles across tumor regions and scatter plots of voxel-wise coherence between different contrasts confirmed a positive correlation between DIR and FLAIR signal intensity and a negative correlation between DIR and both post-contrast T1-weighted image signal intensity and rCBV. Additional discrepancies between FLAIR and DIR abnormal regions were also observed, together suggesting DIR may provide additional information beyond that of FLAIR.
- Published
- 2013
37. Sensory Integration Therapy and DIR/Floortime
- Author
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Estabillo, Jasper A., Matson, Johnny L., and Matson, Johnny L., Series editor
- Published
- 2017
- Full Text
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38. Role of Religious Leaders in Mobilizing Communities to Counter Violent Extremism: A Case Study of Dir Valley of Pakistan.
- Author
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Ahmed, Shakeel, Sajid, Imran A., and Ashraf, Syed Irfan
- Subjects
RELIGIOUS leaders ,RADICALISM ,WAR on Terrorism, 2001-2009 ,SEQUENTIAL analysis ,CIVIC leaders ,TERRORISM ,COUNTERTERRORISM - Abstract
Swat and Dir valleys in Pakistan have seen the brunt of post 9/11 violent extremism in the recent past. Because this extremism was generated and exploited by a few religiously motivated violent organizations, a popular perception emerged that all religious leaders of the society were involved in terrorism. Therefore, this research focuses on the role played by those religious leaders who involved themselves in mobilizing local communities against violent extremism. Employing a mixed-method research approach and sequential analysis strategy our data shows that most of the common local religious leaders played positive role in building community resilience to countering violent extremism during the early phase of the War on Terrorism in these two valleys. [ABSTRACT FROM AUTHOR]
- Published
- 2021
- Full Text
- View/download PDF
39. Dispatchable Substation for Operation and Control of Renewable Energy Resources.
- Author
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Yoo, Yeuntae, Jung, Seungmin, Kang, Sungwoo, Song, Sungyoon, Lee, Jaehyeong, Han, Changhee, and Jang, Gilsoo
- Subjects
RENEWABLE energy sources ,ENERGY storage ,GENERATORS of groups ,WIND power - Abstract
Renewable generation in power systems has proved to be challenging for system operators owing to the increasing levels of penetration. The operation of power systems currently requires additional flexibility and reserves due to the intermittency and unpredictability of renewable generators. However, it is difficult to precisely predict and control the stochastic nature of renewable sources; nevertheless, its capacity continues to increase. To monitor and control renewable generators efficiently, the entire system needs to be established in a hierarchical order. This study proposed the concept of a substation that is uniquely designed for renewable interconnection. The purpose of this substation is simple: to make the renewable generators dispatchable to operators such that each group of renewable generators is sufficiently stable to be considered as conventional generators. For this purpose, methods for sizing and controlling energy storage system are proposed based on forecasts and error distributions. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
40. Nanostructure of DiR-Loaded Solid Lipid Nanoparticles with Potential Bioimaging Functions.
- Author
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Shu, Lei, Fu, Fangqin, Huang, Zhengwei, Huang, Ying, Hu, Ping, and Pan, Xin
- Abstract
The fluorescence dye-loaded nanoparticles are widely used as bioimaging agents in the field of nanotheranostics. However, the nanoparticles for nanotheranostics usually consist of synthetic materials, such as metal, silica, and organic polymers, which are often biologically incompatible and may arouse toxicity issues. Herein, the potential of near-infrared probe DiR-containing solid lipid nanoparticle suspensions (DiR-SLNS) as the bioimaging agent, which was prepared by lipids and surfactants with excellent biocompatibility, was investigated in this study. The nanostructure of DIR-SLNS system and the distribution of DiR were studied by dissipative particle dynamics (DPD) simulations. The stability of physicochemical properties and fluorescence spectra of DIR-SLNS system were investigated using dynamic laser scattering (DLS), nanoparticle tracking analysis (NTA), and fluorescence spectra. The fluorescence intensity-concentration correlation of DIR-SLNS was also evaluated. As a result, DiR-SLNS demonstrated a "core-shell"-like nanostructure and DiR was mainly distributed in the cetyl palmitate (CP) core rather than the surface of SLNS, which was beneficial to its potential applications in bioimaging. DiR-SLNS exhibited remarkable physicochemical stability as the nanoparticles maintained ~ 90% fluorescence intensity during the 10-day storage time. The correlation between fluorescence intensity and concentration was established and validated using a linear regression model. This study proposed a type of promising candidates in nano-scale with higher safety and fluorescence stability for bioimaging. [ABSTRACT FROM AUTHOR]
- Published
- 2020
- Full Text
- View/download PDF
41. Investigation of 4D dose in volumetric modulated arc therapy-based stereotactic body radiation therapy: does fractional dose or number of arcs matter?
- Author
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Shintani, Takashi, Nakamura, Mitsuhiro, Matsuo, Yukinori, Miyabe, Yuki, Mukumoto, Nobutaka, Mitsuyoshi, Takamasa, Iizuka, Yusuke, and Mizowaki, Takashi
- Subjects
RADIOTHERAPY ,TREATMENT of lung tumors ,COMPUTED tomography - Abstract
The aim of this study was to assess the impact of fractional dose and the number of arcs on interplay effects when volumetric modulated arc therapy (VMAT) is used to treat lung tumors with large respiratory motions. A three (fractional dose of 4, 7.5 or 12.5 Gy) by two (number of arcs, one or two) VMAT plan was created for 10 lung cancer cases. The median 3D tumor motion was 17.9 mm (range: 8.2–27.2 mm). Ten phase-specific subplans were generated by calculating the dose on each respiratory phase computed tomography (CT) scan using temporally assigned VMAT arcs. We performed temporal assignment of VMAT arcs using respiratory information obtained from infrared markers placed on the abdomens of the patients during CT simulations. Each phase-specific dose distribution was deformed onto exhale phase CT scans using contour-based deformable image registration, and a 4D plan was created by dose accumulation. The gross tumor volume dose of each 4D plan (4D GTV dose) was compared with the internal target volume dose of the original plan (3D ITV dose). The near-minimum 4D GTV dose (D
99% ) was higher than the near-minimum 3D internal target volume (ITV) dose, whereas the near-maximum 4D GTV dose (D1% ) was lower than the near-maximum 3D ITV dose. However, the difference was negligible, and thus the 4D GTV dose corresponded well with the 3D ITV dose, regardless of the fractional dose and number of arcs. Therefore, interplay effects were negligible in VMAT-based stereotactic body radiation therapy for lung tumors with large respiratory motions. [ABSTRACT FROM AUTHOR]- Published
- 2020
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42. The Anthroponym of Prince Oleg Veshchy (The Seer) as a Possible Legacy of the Venetians
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Rurik ,Dir ,Вещий Олег ,Дир ,Oleg Veshchy (The Seer) ,Venets ,варяги ,General Medicine ,Vikings ,венеты ,Рюрик - Abstract
The article is devoted to the problem of the origin of the name of Oleg Veshchy (The Seer). On the basis of the data of the historiography of Ancient Rus', historical geography, genogeography and linguistics the possible variants of belonging of the given anthroponym to a concrete ethnos and region are analyzed. Using archaeological data and toponymic markers it was shown that the names of the princes of Varangian Rus can be nicknames-demonyms, locating on the territories adjacent to the lower course of the river Odra, belonging to the tribal alliance of the Slavs-Pomorians. It was shown that the demonim "Oleg" may be derived from the Slavic town of Ologost (Ologoshch) Land, located near the Slavic town of Ologost (Volgoshch), modern Volgast. Also the facts of the existence of the Rokhovskaya Land (Rukhovskaya), located on the southern shore of the Szczecin gulf, which may be associated with the remnants of the Rugi tribe assimilated by the Slavs, including those indicated as "Ruses", were cited. Evidence is given that the toponym Voloshch and, respectively, the anthroponym Oleg may be derived from the name of the chthonic god-patron of Veles (Volos), and the basis of this cult may be pre-Slavonic, possibly Venetian and toponymic markers which can be traced to the northern part of the Asia Minor., Статья посвящена проблеме происхождения имени князя Вещего Олега. На основе данных историографии Древней Руси, исторической географии, гено-географии и лингвистики анализируются возможные варианты принадлежности данного антропонима к конкретному этносу и региону. С использованием археологических данных и топонимических маркеров было показано, что имена князей варяжской руси могут быть прозвищами-демонимами, лоциру-ющимися на териториях, прилегающих к нижнему течению реки Одра, принадлежавших племенному союзу славян-поморян. Было показано, что демо-ним «Олег» может быть производным от Ологойской (Ологощской) Земли, находившейся близ славянского города Ологост (Вологощ), современный Вольгаст. Также были приведены факты существования Земли Роховской (Руховской), находившейся на южном побережье Щецинского залива, которая может быть ассоциирована с ассимилированными славянами остатками племени ругов, в том числе указывавшихся как «русы». Приводятся доказательства, что топоним Вологощ, соответственно, антропоним Олег могут быть производными от имени хтоническо-го бога-покровителя Велеса (Волоса), а основы этого культа могут быть праславянскими, возможно, венетскими, и топонимическими маркерами, которые прослеживаются до северной части полуострова Малая Азия.
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- 2022
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43. Optic nerve double inversion recovery hypersignal in patients with clinically isolated syndrome is associated with asymptomatic gadolinium-enhanced lesion.
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London, Frédéric, Zéphir, Hélène, Hadhoum, Nawal, Lannoy, Julien, Vermersch, Patrick, Pruvo, Jean-Pierre, Hodel, Jérôme, Leclerc, Xavier, and Outteryck, Olivier
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OPTIC nerve , *OPTICAL coherence tomography , *OPTIC nerve injuries , *NERVE fibers - Abstract
Background: Optic nerve involvement is not considered in dissemination in space (DIS) or time (DIT) of multiple sclerosis (MS) lesions. Objectives: To evaluate frequency of optic nerve involvement using three-dimensional (3D)-double inversion recovery (DIR) sequence in clinically isolated syndrome (CIS) and to measure its relationship with DIS and DIT (2010 and 2017 McDonald criteria). Methods: From November 2013 to August 2016, 57 CIS patients underwent 3T-magnetic resonance imaging (3T-MRI) including 3D-DIR sequence and optical coherence tomography (OCT) at 3 months after CIS. We assessed signal abnormalities of the optic nerves on DIR sequence and collected data for DIS and DIT criteria according to 2010 and 2017 McDonald criteria. Results: Among the 57 recruited patients, the presence of ⩾1 DIR hypersignal in optic nerve was observed in 36 (63%; 48 optic nerves) including asymptomatic hypersignal in 22 (38.5%; 25 optic nerves). Optic nerve involvement was significantly associated with DIT (p = 0.006) and MS according to 2010 criteria (p = 0.01) but was not significantly associated with presence of DIS criteria according to 2010 and 2017 McDonald criteria. We identified a significant (p < 0.001) temporal peripapillary retinal nerve fiber layer thinning on eyes with optic nerve involvement versus healthy controls. Conclusions: Optic nerve involvement is very frequent at the earliest clinical stage of MS. It is associated with the presence of asymptomatic gadolinium-enhancement and retinal axonal loss and may reflect the inflammatory disease activity level. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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44. Two new species of Hygrophorus from temperate Himalayan Oak forests of Pakistan.
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Naseer, Arooj, Khalid, Abdul Nasir, Healy, Rosanne, and Smith, Matthew E.
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RIBOSOMAL DNA , *NUCLEAR DNA , *NUCLEOTIDE sequence , *SPECIES , *OAK , *BASIDIOSPORES - Abstract
The genus Hygrophorus is poorly studied from Asia. From Pakistan, only one species has been reported so far. Two new species in the genus have been collected from Himalayan oak forests of Pakistan. Hygrophorus alboflavescens (section Pudorini, subgenus Colorati) is characterised by its pure white, centrally depressed pileus, occurrence of white stipe with yellow patches at lower half and broader (4.98 μm) basidiospores. Hygrophorus scabrellus (section Hygrophorus, subgenus Hygrophorus) is characterised by its yellowish-green stipe with white apex that has fine scales on the entire stipe, an off-white pileus with dark green and greyish fibrils, ovoid to ellipsoid basidiospores and clavate 4-spored basidia. Macro- and micromorphological descriptions have revealed that both these taxa are not yet described. Phylogenetic estimation based on DNA sequences from the internal transcribed spacer (ITS) region and large subunit (LSU) of the nuclear ribosomal DNA (rDNA) genes, is congruent with the morphological characters that help to delimit these as new species of Hygrophorus. Allied taxa are also compared. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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45. Voxel-based morphometry analysis of double inversion-recovery magnetic resonance imaging for detecting microscopic lesions: a simulation study.
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Yusuke, Sato, Norio, Hayashi, Tomoko, Maruyama, Shunichi, Motegi, Koichi, Ujita, Takayuki, Suto, Haruyuki, Watanabe, Toshihiro, Ogura, Akio, Ogura, and Yoshito, Tsushima
- Abstract
Double inversion-recovery (DIR) imaging has the potential to improve the detection of subcortical lesions through the use of voxel-based morphometry (VBM) analysis. The aim of this study was to clarify the characteristics of detectable lesions by performing a VBM analysis on DIR images of simulated lesions. Twenty healthy volunteers underwent magnetic resonance imaging using a head three-dimensional DIR sequence. The images were processed using SPM12; then, the selected images with simulated lesions were analyzed via VBM. The VBM results were evaluated using free-response receiver-operating characteristic curves and a receiver-operating characteristic analysis. The sensitivity was 100% (5/5), with 5.6 false-positive objects per case, in simulated lesions with a contrast of 0.6 and a size of 2.4 mm. The sensitivity was 80% (4/5), with 5.4 false-positive objects per case, in simulated lesions with a contrast of 0.5 and a size of 2.4 mm. The mean area under the curve value was increased from 0.783 to 0.883 using VBM, with a statistically significant difference (p < 0.01). The VBM analysis of the DIR images using SPM alone showed the potential to detect subcortical microscopic lesions. Early detection of Alzheimer's disease may be possible by adapting VBM in the clinical setting. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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46. The Prognostic Value of White-Matter Selective Double Inversion Recovery MRI Sequence in Multiple Sclerosis: An Exploratory Study
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Francesco Crescenzo, Damiano Marastoni, Anna Isabella Pisani, Agnese Tamanti, Caterina Dapor, Annalisa Colombi, Alessandro Brillo, Roberta Magliozzi, Francesca Benedetta Pizzini, Marco Castellaro, and Massimiliano Calabrese
- Subjects
multiple sclerosis ,white matter ,double inversion recovery ,DIR ,MRI ,Medicine (General) ,R5-920 - Abstract
Using a white-matter selective double inversion recovery sequence (WM-DIR) that suppresses both grey matter (GM) and cerebrospinal fluid (CSF) signals, some white matter (WM) lesions appear surrounded by a dark rim. These dark rim lesions (DRLs) seem to be specific for multiple sclerosis (MS). They could be of great usefulness in clinical practice, proving to increase the MRI diagnostic criteria specificity. The aims of this study are the identification of DRLs on 1.5 T MRI, the exploration of the relationship between DRLs and disease course, the characterization of DRLs with respect to perilesional normal-appearing WM using magnetization transfer imaging, and the investigation of possible differences in the underlying tissue properties by assessing WM-DIR images obtained at 3.0 T MRI. DRLs are frequent in primary progressive MS (PPMS) patients. Amongst relapsing-remitting MS (RRMS) patients, DRLs are associated with a high risk of the disease worsening and secondary progressive MS (SPMS) conversion after 15 years. The mean magnetization transfer ratio (MTR) of DRLs is significantly different from the lesion without the dark rim, suggesting that DRLs correspond to more destructive lesions.
- Published
- 2021
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47. Inter- and intrafractional 4D dose accumulation for evaluating ΔNTCP robustness in lung cancer
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Andreas Smolders, Adriaan C. Hengeveld, Stefan Both, Robin Wijsman, Johannes A. Langendijk, Damien C. Weber, Anthony J. Lomax, Francesca Albertini, and Gabriel Guterres Marmitt
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DIR ,Oncology ,Radiology, Nuclear Medicine and imaging ,610 Medicine & health ,Hematology ,NTCP ,Lung cancer ,Robustness ,Proton therapy - Abstract
Background and purpose: Model-based selection of proton therapy patients relies on a predefined reduction in normal tissue complication probability (NTCP) with respect to photon therapy. The decision is necessarily made based on the treatment plan, but NTCP can be affected when the delivered treatment deviates from the plan due to delivery inaccuracies. Especially for proton therapy of lung cancer, this can be important because of tissue density changes and, with pencil beam scanning, the interplay effect between the proton beam and breathing motion. Materials and methods: In this work, we verified whether the expected benefit of proton therapy is retained despite delivery inaccuracies by reconstructing the delivered treatment using log-file based dose reconstruction and inter- and intrafractional accumulation. Additionally, the importance of two uncertain parameters for treatment reconstruction, namely deformable image registration (DIR) algorithm and α/β ratio, was assessed. Results: The expected benefit or proton therapy was confirmed in 97% of all studied cases, despite regular differences up to 2 percent point (p.p.) NTCP between the delivered and planned treatments. The choice of DIR algorithm affected NTCP up to 1.6 p.p., an order of magnitude higher than the effect of α/β ratio. Conclusion: For the patient population and treatment technique employed, the predicted clinical benefit for patients selected for proton therapy was confirmed for 97.0% percent of all cases, although the NTCP based proton selection was subject to 2 p.p. variations due to delivery inaccuracies., Radiotherapy & Oncology, 182, ISSN:0167-8140, ISSN:1879-0887
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- 2023
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48. Optimal Path and Best-Effort Delivery in Wireless Sensor Networks
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Kumar, Vipin, Kumar, Sushil, Kacprzyk, Janusz, Series editor, Mohapatra, Durga Prasad, editor, and Patnaik, Srikanta, editor
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- 2014
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49. Dispatchable Substation for Operation and Control of Renewable Energy Resources
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Yeuntae Yoo, Seungmin Jung, Sungwoo Kang, Sungyoon Song, Jaehyeong Lee, Changhee Han, and Gilsoo Jang
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DIR ,ESS ,forecast error ,renewable generator ,substation ,Technology ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Biology (General) ,QH301-705.5 ,Physics ,QC1-999 ,Chemistry ,QD1-999 - Abstract
Renewable generation in power systems has proved to be challenging for system operators owing to the increasing levels of penetration. The operation of power systems currently requires additional flexibility and reserves due to the intermittency and unpredictability of renewable generators. However, it is difficult to precisely predict and control the stochastic nature of renewable sources; nevertheless, its capacity continues to increase. To monitor and control renewable generators efficiently, the entire system needs to be established in a hierarchical order. This study proposed the concept of a substation that is uniquely designed for renewable interconnection. The purpose of this substation is simple: to make the renewable generators dispatchable to operators such that each group of renewable generators is sufficiently stable to be considered as conventional generators. For this purpose, methods for sizing and controlling energy storage system are proposed based on forecasts and error distributions.
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- 2020
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50. Breastfeeding, 'tainted' love, and femmephobia
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Lilith A. Whiley, Sarah E. Stutterheim, Gina Grandy, Section Applied Social Psychology, and RS: FPN WSP II
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050103 clinical psychology ,dir ,Health (social science) ,Social Psychology ,LONG-TERM ,media_common.quotation_subject ,Breastfeeding ,050109 social psychology ,psychology ,Gender Studies ,LESBIANS ,femmephobia ,STEREOTYPES ,0501 psychology and cognitive sciences ,Applied Psychology ,media_common ,embodiment ,femininity ,US ,MOTHERS ,05 social sciences ,STIGMA ,DONT ,LIMINALITY ,Dirt ,Femininity ,EXPERIENCES ,Work (electrical) ,Aesthetics ,Embodied cognition ,Industrial and organizational psychology ,GENDER ,Psychology - Abstract
In this conceptual analysis, we theorise breastfeeding as an embodied ‘dirty’ performance of femininity and draw on Hoskin’s (2019a) work on femme theory to propose that women who breastfeed in public, who do so for an ‘extended’ time, and who enjoy it are subject to femmephobic attacks. We integrate three streams of literature to unsettle the ‘taint’ of breastfeeding. We first theorise breastfeeding as an act of femininity where women perform gender trouble in line with Butler's work. We also draw on Douglas’ work on ‘dirt’ and Rivera’s work on emotional ‘dirty’ work to theorise that ‘taint’ is one way in which society stigmatises the phenomenon of breastfeeding. Specifically, we propose that embodied breastfeeding evokes ‘tainted’ emotions. We then draw on Schippers’ work on ‘containing’ pariah forms of femininity (lest they ‘contaminate’ patriarchy) by showing how femmephobic stigmatisation limits breastfeeding women’s corporeality and presence in shared spaces.
- Published
- 2022
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