45,829 results
Search Results
52. Architecture for the Execution of Tasks in Apache Spark in Heterogeneous Environments
- Author
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Serrano, Estefania, Blas, Javier Garcia, Carretero, Jesus, Abella, Monica, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Desprez, Frédéric, editor, Dutot, Pierre-François, editor, Kaklamanis, Christos, editor, Marchal, Loris, editor, Molitorisz, Korbinian, editor, Ricci, Laura, editor, Scarano, Vittorio, editor, Vega-Rodríguez, Miguel A., editor, Varbanescu, Ana Lucia, editor, Hunold, Sascha, editor, Scott, Stephen L., editor, Lankes, Stefan, editor, and Weidendorfer, Josef, editor
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- 2017
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53. North American Society for Pediatric Gastroenterology, Hepatology and Nutrition and the Society for Pediatric Radiology Joint Position Paper on Noninvasive Imaging of Pediatric Pancreatitis: Literature Summary and Recommendations
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Maisam Abu-El-Haija, Judy H Squires, Sudha A. Anupindi, J Andres Martinez, Veronique D. Morinville, Jorge Alberto Macias-Flores, Sohail Z. Husain, A. Jay Freeman, Andrew T. Trout, Uzma Shah, and Kalyan R Parashette
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medicine.medical_specialty ,Noninvasive imaging ,medicine.diagnostic_test ,business.industry ,Gastroenterology ,Computed tomography ,Magnetic resonance imaging ,Hepatology ,medicine.disease ,03 medical and health sciences ,Pediatric Radiology ,0302 clinical medicine ,030225 pediatrics ,Internal medicine ,Pediatrics, Perinatology and Child Health ,medicine ,Position paper ,Pancreatitis ,030211 gastroenterology & hepatology ,Intensive care medicine ,business ,Pediatric gastroenterology - Abstract
The reported incidence of pediatric pancreatitis is increasing. Noninvasive imaging, including ultrasound, computed tomography (CT), and magnetic resonance imaging (MRI), play important roles in the diagnosis, staging, follow-up, and management of pancreatitis in children. In this position paper, generated by members of the Pancreas Committee of the North American Society for Pediatric Gastroenterology, Hepatology and Nutrition (NASPGHAN) and the Abdominal Imaging Committee of The Society for Pediatric Radiology (SPR), we review the roles of noninvasive imaging in pediatric acute, acute recurrent, and chronic pancreatitis. We discuss available evidence related to noninvasive imaging, highlighting evidence specific to pediatric populations, and we make joint recommendations for use of noninvasive imaging. Further, we highlight the need for research to define the performance and role of noninvasive imaging in pediatric pancreatitis.
- Published
- 2020
54. COVID-19 Detection on Chest X-ray and CT Scan: A Review of the Top-100 Most Cited Papers.
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Costa, Yandre M. G., Silva Jr., Sergio A., Teixeira, Lucas O., Pereira, Rodolfo M., Bertolini, Diego, Britto Jr., Alceu S., Oliveira, Luiz S., and Cavalcanti, George D. C.
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COMPUTED tomography , *X-rays , *X-ray detection , *COMPUTER-assisted image analysis (Medicine) , *COVID-19 , *DIAGNOSTIC imaging - Abstract
Since the beginning of the COVID-19 pandemic, many works have been published proposing solutions to the problems that arose in this scenario. In this vein, one of the topics that attracted the most attention is the development of computer-based strategies to detect COVID-19 from thoracic medical imaging, such as chest X-ray (CXR) and computerized tomography scan (CT scan). By searching for works already published on this theme, we can easily find thousands of them. This is partly explained by the fact that the most severe worldwide pandemic emerged amid the technological advances recently achieved, and also considering the technical facilities to deal with the large amount of data produced in this context. Even though several of these works describe important advances, we cannot overlook the fact that others only use well-known methods and techniques without a more relevant and critical contribution. Hence, differentiating the works with the most relevant contributions is not a trivial task. The number of citations obtained by a paper is probably the most straightforward and intuitive way to verify its impact on the research community. Aiming to help researchers in this scenario, we present a review of the top-100 most cited papers in this field of investigation according to the Google Scholar search engine. We evaluate the distribution of the top-100 papers taking into account some important aspects, such as the type of medical imaging explored, learning settings, segmentation strategy, explainable artificial intelligence (XAI), and finally, the dataset and code availability. [ABSTRACT FROM AUTHOR]
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- 2022
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55. Thermal fiber orientation tensors for digital paper physics.
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Schneider, Matti, Kabel, Matthias, Andrä, Heiko, Lenske, Alexander, Hauptmann, Marek, Majschak, Jens-Peter, Penter, Lars, Hardtmann, André, Ihlenfeldt, Steffen, Westerteiger, Rolf, Glatt, Erik, and Wiegmann, Andreas
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FIBER orientation , *ELECTRONIC paper , *THERMAL conductivity , *COMPUTED tomography , *WOOD products , *DIGITAL image processing - Abstract
We estimate the orientation of wood fibers in porous networks like paper, paperboard or fiberboard by computing digital thermal conductivity experiments on micro-computed tomography ( μ CT) images with artificial isotropic thermal conductivity parameters. The accuracy of mechanical and thermal constitutive models for porous wood fiber based materials crucially depends on knowing the wood fiber orientation. Unfortunately, due to the high porosity, the micro-heterogeneity of wood fibers, the high carbon content of organic materials and the unknown additives present in industrial paper, μ CT-scans often exhibit low contrast and strong artifacts. Conventional image processing approaches encounter difficulties, as they rely upon convex fiber cross sections. We propose a solution by circumventing the segmentation of single wood fibers in μ CT images, by performing thermal conductivity simulations on binarized wood fiber structures, where an artificial isotropic thermal conductivity is associated to the fibers and the pore space is considered as isolating. The local and global temperature fluxes are assembled into a fiber orientation tensor. This method overcomes the limitations of the mentioned local image processing approaches, as individual fibers need not be resolved and convergence for increasing resolution is a consequence of abstract mathematical theory. We use our novel method to analyze large three-dimensional μ CT-scans and a synchrotron scan of a paperboard sample, serving as the starting point of an accurate micromechanical modeling of the effective anisotropic mechanical behavior of paper and paperboard. These results are crucial for calculating the mechanical strength of deep-drawn paperboard, which will be accomplished in a subsequent article. [ABSTRACT FROM AUTHOR]
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- 2016
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56. Efficient Pancreas Segmentation in Computed Tomography Based on Region-Growing
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Tam, Tran Duc, Binh, Nguyen Thanh, Akan, Ozgur, Series editor, Bellavista, Paolo, Series editor, Cao, Jiannong, Series editor, Coulson, Geoffrey, Series editor, Dressler, Falko, Series editor, Ferrari, Domenico, Series editor, Gerla, Mario, Series editor, Kobayashi, Hisashi, Series editor, Palazzo, Sergio, Series editor, Sahni, Sartaj, Series editor, Shen, Xuemin (Sherman), Series editor, Stan, Mircea, Series editor, Xiaohua, Jia, Series editor, Zomaya, Albert, Series editor, Vinh, Phan Cong, editor, Vassev, Emil, editor, and Hinchey, Mike, editor
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- 2015
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57. Paper-like bilateral sternocleidomastoid muscle atrophy may suggest the occurrence of sustained ventricular tachycardia
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Keiji Matsunaga, MD, Yuichi Miyake, MD, PhD, Takahisa Noma, MD, PhD, and Tetsuo Minamino, MD, PhD
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Sternocleidomastoid muscle atrophy ,Sustained ventricular tachycardia ,Myotonic dystrophy ,Computed tomography ,Cardiac resynchronization therapy with defibrillator ,Diseases of the circulatory (Cardiovascular) system ,RC666-701 - Published
- 2020
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58. Segmentation of Small Animal Computed Tomography Images Using Original CT Values and Converted Grayscale Values
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Ma, Guoqiang, Li, Naixiang, Wang, Xiaojuan, Li, Daoliang, editor, and Chen, Yingyi, editor
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- 2014
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59. Recommendations in pre-procedural imaging assessment for TAVI intervention: SIC-SIRM position paper part 2 (CT and MR angiography, standard medical reporting, future perspectives)
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Riccardo Marano, Gianluca Pontone, Eustachio Agricola, Brunilda Alushi, Antonio Bartorelli, Matteo Cameli, Nazario Carrabba, Antonio Esposito, Riccardo Faletti, Marco Francone, Nicola Galea, Paolo Golino, Marco Guglielmo, Anna Palmisano, Sonia Petronio, Maria Petullà, Silvia Pradella, Flavio Ribichini, Francesco Romeo, Vincenzo Russo, Salvatore Scandura, Nicolò Schicchi, Carmen Spaccarotella, Fabrizio Tomai, Ciro Indolfi, Maurizio Centonze, Marano, R., Pontone, G., Agricola, E., Alushi, B., Bartorelli, A., Cameli, M., Carrabba, N., Esposito, A., Faletti, R., Francone, M., Galea, N., Golino, P., Guglielmo, M., Palmisano, A., Petronio, S., Petulla, M., Pradella, S., Ribichini, F., Romeo, F., Russo, V., Scandura, S., Schicchi, N., Spaccarotella, C., Tomai, F., Indolfi, C., and Centonze, M.
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Aortic valve stenosi ,Angiography ,Cardiology ,General Medicine ,Aortic valve stenosis ,Computed tomography ,Echocardiography ,Imaging ,Magnetic resonance ,TAVI ,Transcatheter Aortic Valve Replacement ,Aortic Valve ,Humans ,Radiology, Nuclear Medicine and imaging ,Tomography, X-Ray Computed - Abstract
Non-invasive cardiovascular imaging owns a pivotal role in the preoperative assessment of patient candidates for transcatheter aortic valve implantation (TAVI), providing a wide range of crucial information to select the patients who will benefit the most and have the procedure done safely. This document has been developed by a joined group of experts of the Italian Society of Cardiology and the Italian Society of Medical and Interventional Radiology and aims to produce an updated consensus statement about the pre-procedural imaging assessment in candidate patients for TAVI intervention. The writing committee consisted of members and experts of both societies who worked jointly to develop a more integrated approach in the field of cardiac and vascular radiology. Part 2 of the document will cover CT and MR angiography, standard medical reporting, and future perspectives.
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- 2022
60. Contemporary rationale for non-invasive imaging of adverse coronary plaque features to identify the vulnerable patient: a Position Paper from the European Society of Cardiology Working Group on Atherosclerosis and Vascular Biology and the European Association of Cardiovascular Imaging
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Evelyn Regar, Patrick W. Serruys, Johannes Waltenberger, Akiko Maehara, Antonius F.W. van der Steen, Marc R. Dweck, Zahi A. Fayad, David E. Newby, Jagat Narula, James E. Muller, M. Eline Kooi, Pál Maurovich-Horvat, Chun Yuan, Gianluca Pontone, Peter Stone, Magnus Bäck, Frank J. H. Gijsen, Jolanda J. Wentzel, Bernard Cosyns, Tim Leiner, Esther Lutgens, Kim Van der Heiden, Paul C. Evans, RS: Carim - B06 Imaging, Beeldvorming, MUMC+: DA BV Klinisch Fysicus (9), Medical Biochemistry, ACS - Atherosclerosis & ischemic syndromes, Cardiology, Clinical sciences, and Cardio-vascular diseases
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medicine.medical_specialty ,Cardiology ,Coronary Artery Disease ,030204 cardiovascular system & hematology ,medicine.disease_cause ,FLUORIDE UPTAKE ,THERAPY ,HIGH-INTENSITY SIGNALS ,MECHANISMS ,03 medical and health sciences ,0302 clinical medicine ,Internal medicine ,medicine ,Medical imaging ,Humans ,magnetic resonance imaging ,ARTERY-DISEASE ,Radiology, Nuclear Medicine and imaging ,030212 general & internal medicine ,Myocardial infarction ,Biology ,Coronary atherosclerosis ,OUTCOMES ,medicine.diagnostic_test ,SHEAR-STRESS ,business.industry ,Fibrous cap ,Magnetic resonance imaging ,computed tomography ,General Medicine ,NATURAL-HISTORY ,medicine.disease ,CT ANGIOGRAPHY ,Vulnerable plaque ,Plaque, Atherosclerotic ,Stenosis ,HIGH-RISK ,medicine.anatomical_structure ,Radiology Nuclear Medicine and imaging ,inflammation ,Position paper ,vulnerable plaque ,atherosclerosis ,business ,Cardiology and Cardiovascular Medicine - Abstract
Atherosclerotic plaques prone to rupture may cause acute myocardial infarction (MI) but can also heal without causing an event. Certain common histopathological features, including inflammation, a thin fibrous cap, positive remodelling, a large necrotic core, microcalcification, and plaque haemorrhage are commonly found in plaques causing an acute event. Recent advances in imaging techniques have made it possible to detect not only luminal stenosis and overall coronary atherosclerosis burden but also to identify such adverse plaque characteristics. However, the predictive value of identifying individual adverse atherosclerotic plaques for future events has remained poor. In this Position Paper, the relationship between vulnerable plaque imaging and MI is addressed, mainly for non-invasive assessments but also for invasive imaging of adverse plaques in patients undergoing invasive coronary angiography. Dynamic changes in atherosclerotic plaque development and composition may indicate that an adverse plaque phenotype should be considered at the patient level rather than for individual plaques. Imaging of adverse plaque burden throughout the coronary vascular tree, in combination with biomarkers and biomechanical parameters, therefore holds promise for identifying subjects at increased risk of MI and for guiding medical and invasive treatment.
- Published
- 2020
61. Bulk resistance and internal contacts of carbon fiber paper determined via X-ray computed tomography.
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Shi, Qitong, Feng, Cong, Tang, Fumin, Li, Bing, Ming, Pingwen, and Zhang, Cunman
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COMPUTED tomography , *CARBON fibers , *CARBON paper , *FUEL cells , *CHARGE exchange , *X-rays - Abstract
Owing to the challenge of irregular morphology, the impact of compressed carbon fiber paper (CFP) on fuel cell performance and durability is intricate. As a carbon-carbon composite, the internal contact state of CFP directly determines its mechanical and physical properties. In this paper, fiber distribution and intersection of uncompressed CFP are achieved by X-ray computed tomography. Then we established an analytical model of bulk resistance based on the electron transfer path and provided a function to describe the internal contact state with strain. The results imply that the increasing number of electron paths and the variation of the contact state are the main factors for the decrease in bulk resistance under compression. The turning points in the contact state curve divide the range of pressure into fiber contact, elastic-plastic deformation and fiber fracture region, which can be used to assess the mechanical properties of CFP and determine the optimal pressure for fuel cell assembly. [Display omitted] • Fiber distribution and intersection of uncompressed CFP is given. • The effect of contact resistance between fibers on bulk resistance is evaluated. • The structural information to electric and mechanical properties is connected. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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62. Recommendations in pre-procedural imaging assessment for transcatheter aortic valve implantation intervention: Italian Society of Cardiology (SIC)–Italian Society of Medical and Interventional Radiology (SIRM) position paper part 1 (Clinical Indication and Basic Technical Aspects, Heart Team, Role of Echocardiography)
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Gianluca Pontone, Riccardo Marano, Eustachio Agricola, Brunilda Alushi, Antonio Bartorelli, Matteo Cameli, Nazario Carrabba, Antonio Esposito, Riccardo Faletti, Marco Francone, Nicola Galea, Paolo Golino, Marco Guglielmo, Anna Palmisano, Sonia Petronio, Maria Petullà, Silvia Pradella, Flavio Ribichini, Francesco Romeo, Vincenzo Russo, Salvatore Scandura, Nicolò Schicchi, Carmen Spaccarotella, Fabrizio Tomai, Maurizio Centonze, Ciro indolfi, Pontone, Gianluca, Marano, Riccardo, Agricola, Eustachio, Alushi, Brunilda, Bartorelli, Antonio, Cameli, Matteo, Carrabba, Nazario, Esposito, Antonio, Faletti, Riccardo, Francone, Marco, Galea, Nicola, Golino, Paolo, Guglielmo, Marco, Palmisano, Anna, Petronio, Sonia, Petullà, Maria, Pradella, Silvia, Ribichini, Flavio, Romeo, Francesco, Russo, Vincenzo, Scandura, Salvatore, Schicchi, Nicolò, Spaccarotella, Carmen, Tomai, Fabrizio, Centonze, Maurizio, and Indolfi, Ciro
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Heart Valve Prosthesis Implantation ,aortic valve stenosis ,computed tomography ,echocardiography ,imaging ,magnetic resonance ,transcatheter aortic valve implantation ,Cardiology ,Settore MED/11 - Malattie dell'Apparato Cardiovascolare ,General Medicine ,Radiology, Interventional ,Transcatheter Aortic Valve Replacement ,Aortic Valve ,Humans ,Cardiology and Cardiovascular Medicine - Abstract
Non-invasive cardiovascular imaging owns a pivotal role in the preoperative assessment of patients for transcatheter aortic valve implantation (TAVI), providing a wide range of crucial information to select the patients who will benefit the most and have the procedure done safely. Although advanced cardiac imaging with cardiac computed tomography is routinely used for a detailed anatomic assessment before TAVI, echocardiography remains the first imaging modality to assess aortic stenosis severity and to provide essential functional information. This document results from the collaboration between the Italian Society of Cardiology (SIC) and the Italian Society of Medical and Interventional Radiology (SIRM), aiming to produce an updated consensus statement about the pre-procedural imaging assessment in patient for TAVI. The writing committee is composed of radiologists and cardiologists, experts in the field of cardiac imaging and structural heart diseases. Part 1 of the document, after a brief overview of the clinical indication and basic technical aspects of TAVI, will focus on the role of echocardiography in TAVI pre-procedural planning.
- Published
- 2022
63. The Sinonasal Outcome Test-22 or European Position Paper: Which Is More Indicative of Imaging Results?
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Jennifer J. Shin, C. Eduardo Corrales, Anthony A. Prince, Allen S. Zhou, and Alice Z. Maxfield
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Adult ,Male ,medicine.medical_specialty ,Adolescent ,Chronic rhinosinusitis ,Computed tomography ,Comorbidity ,Outcome (game theory) ,Young Adult ,Paranasal Sinuses ,medicine ,Humans ,Sinusitis ,diagnostic assessment ,rhinosinusitis ,Aged ,Rhinitis ,Original Research ,Aged, 80 and over ,medicine.diagnostic_test ,predictive value ,business.industry ,Symptom severity ,COVID-19 ,position statement ,computed tomography ,Middle Aged ,Predictive value ,Telemedicine ,Test (assessment) ,Otorhinolaryngology ,ROC Curve ,patient-reported outcome measure ,Chronic Disease ,Diagnostic assessment ,Position paper ,Surgery ,Female ,Sino-Nasal Outcome Test ,Radiology ,business - Abstract
Objective The 22-item Sinonasal Outcome Test (SNOT-22) is a trusted measure of symptom severity in chronic rhinosinusitis. The European Position Paper on Rhinosinusitis (EPOS) provides widely accepted diagnostic criteria, which include sinonasal symptoms, their duration, and imaging results. Our objective was to compare these approaches to assessing symptoms to determine if either was more indicative of radiologic findings, to support decisions in telehealth. Study Design Observational outcomes study. Setting Tertiary care center. Methods In total, 162 consecutive patients provided a structured sinonasal history, completed the SNOT-22, and underwent sinus computed tomography (CT) within 1 month. SNOT-22 scores, EPOS-defined symptom sets, and Lund-Mackay results were assessed. To facilitate direct comparisons, we performed stepwise evaluations of sinonasal symptoms alone and combined with duration. The discriminatory capacity for imaging results was determined through areas under the receiver operating characteristic curves (ROC-AUC) for dichotomous outcomes and ordinal regression for multilevel outcomes. Results In ROC-AUC analyses, SNOT-22 and EPOS-defined symptoms had similar discriminatory capacity for Lund-Mackay scores, regardless of duration. Within ordinal regression analyses, SNOT-22 nasal scores were significantly associated with Lund-Mackay scores, while EPOS-defined nasal symptoms were not statistically significantly related. Conclusions SNOT-22 nasal scores and EPOS-defined nasal symptoms may have similar associations with imaging results when assessed via ROC-AUC, while SNOT-22 may have more association within ordinal data. Understanding the implications of discrete patterns of symptoms may confer benefit, particularly when in-person and fiberoptic exams are limited.
- Published
- 2020
64. Special Issue on Rock Fracturing and Fault Activation: Experiments and Models: Selected Papers Presented at the 13th EURO-Conference on Rock Physics and Geomechanics—The Guéguen Conference Held on 2–6 September 2019 in Potsdam, Germany.
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Hofmann, Hannes, Blöcher, Guido, and Zang, Arno
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HYDRAULIC fracturing , *PHYSICS , *SURFACE fault ruptures , *ROCK deformation , *COMPUTED tomography , *FLUID injection , *SEISMIC waves - Abstract
We admit, however, that fracture mechanical principles and rock physics elements behind rock fracturing and fault activation may be similar, and that the joint discussion of fracturing and faulting, therefore, has a long tradition in the rock mechanics and rock engineering community. 1 Participants of the '13th EURO-Conference on Rock Physics and Geomechanics - The Guéguen Conference' during the social event at the Winzerberg Potsdam This special issue consists of 19 scientific papers which are based on these conference contributions and all of which address different important aspects relevant to the variety of industrial applications outlined above. This special issue is dedicated to our dear colleague and friend Prof. Ove Stephansson, who was not only one of Sweden's most influential geologists, but also an enthusiastic supporter of the 13th EURO-Conference on Rock Physics and Geomechanics. Special Issue on Rock Fracturing and Fault Activation: Experiments and Models: Selected Papers Presented at the 13th EURO-Conference on Rock Physics and Geomechanics - The Guéguen Conference Held on 2-6 September 2019 in Potsdam, Germany. [Extracted from the article]
- Published
- 2021
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65. Terahertz Nondestructive Testing Method of Oil-paper Insulation Debonding and Foreign Matter Defects.
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Li, Jiajun, Yang, Lijun, He, Yuxin, Li, Wei, and Wu, Chao
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NONDESTRUCTIVE testing , *TERAHERTZ technology , *COMPUTED tomography , *DEBONDING , *TEST methods , *TRANSFORMER insulation - Abstract
Defects, such as debonding and foreign matters in transformer insulation paperboard, lead to local field strength concentration, thereby seriously affecting the safe operation of equipment. At present, industrial X-ray computed tomography scanning technology is mostly used to detect such defects. However, the equipment is expensive, the operation is complicated, and radiation hazard exists. In this study, terahertz time domain spectroscopy is introduced to explore the nondestructive testing method of oil-paper insulation defects. Three typical insulation paperboard defects of interface debonding, metal foreign matter mixing, and local carbonization traces were taken as the research objects. An artificial defect model is prepared. The time and frequency domain waveform characteristics of terahertz pulse wave propagating in the defect model are tested and analyzed. The results show that when the thickness of insulation paperboard covering is less than 5 mm, based on the amplitude and delay characteristics of terahertz time-domain signal, the location and size of typical internal defects can be accurately obtained, and time spectrum imaging can be realized. This study proves theoretically and experimentally the feasibility of noncontact and nondestructive testing for the internal defects of insulation paperboard by using terahertz technology. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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66. The Effect of Fiber Orientation on Stochastic Reconstruction and Permeability of a Carbon Paper Gas Diffusion Layer
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Tong Zhang, Teng Jin, Yuan Gao, and Xiaoyan Wu
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Control and Optimization ,Materials science ,business.product_category ,Fiber orientation ,Physics::Optics ,Energy Engineering and Power Technology ,Computed tomography ,02 engineering and technology ,010402 general chemistry ,01 natural sciences ,lcsh:Technology ,stochastic reconstruction ,carbon paper gas diffusion layer ,Lattice (order) ,Fluid dynamics ,medicine ,fiber pitch ,Carbon paper ,Electrical and Electronic Engineering ,Composite material ,Engineering (miscellaneous) ,X-ray CT ,medicine.diagnostic_test ,Renewable Energy, Sustainability and the Environment ,lcsh:T ,021001 nanoscience & nanotechnology ,Pitch range ,0104 chemical sciences ,Gas diffusion layer ,Permeability (electromagnetism) ,permeability ,0210 nano-technology ,business ,Energy (miscellaneous) - Abstract
By analyzing the three-dimensional digital model of a real carbon paper gas diffusion layer (GDL) reconstructed by X-ray computed tomography (CT), it was found that fibers are not distributed at any angle but within a certain range. The fiber orientation can be represented by fiber pitch (i.e., the angle between a single fiber and the in-plane direction). The effect of fiber orientation on stochastic reconstruction and transport properties (permeability) was investigated in this paper to find which fiber pitch range can achieve a better GDL on fluid flow. First, the actual fiber pitch was measured by analyzing SGL-24BA images obtained by X-ray CT. Also, seven different ranges of fiber pitch were randomly chosen to reconstruct GDL. Then, the permeability of these digital models was calculated using the Lattice Bolzmann Method (LBM) and discussed to obtain the fiber pitch range of the optimal permeability. The results show that the mean fiber pitch of SGL-24BA is 2.40°, and the individual values are all less than 6°, also, the permeability of the through-plane direction increases gradually as the range of fiber pitch increases, which can be used for the structural design of carbon paper GDL.
- Published
- 2019
67. A Smart Memory Accelerated Computed Tomography Parallel Backprojection
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Zhu, Qiuling, Pileggi, Larry, Franchettis, Franz, Burg, Andreas, editor, Coṣkun, Ayṣe, editor, Guthaus, Matthew, editor, Katkoori, Srinivas, editor, and Reis, Ricardo, editor
- Published
- 2013
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68. White Paper of the Society of Computed Body Tomography and Magnetic Resonance on Dual-Energy CT, Part 3
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William P. Shuman, Terri J. Vrtiska, U. Joseph Schoepf, Dushyant V. Sahani, Desiree E. Morgan, Marilyn J. Siegel, Carlo N. De Cecco, Lincoln L. Berland, W. Dennis Foley, Ravi K. Kaza, Benjamin M. Yeh, Lynne S. Steinbach, Daniel T. Boll, and David N. Bolus
- Subjects
Lung Diseases ,medicine.medical_specialty ,Radiography ,Computed tomography ,030218 nuclear medicine & medical imaging ,Radiography, Dual-Energy Scanned Projection ,03 medical and health sciences ,0302 clinical medicine ,White paper ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Musculoskeletal Diseases ,Computed tomography angiography ,Evidence-Based Medicine ,medicine.diagnostic_test ,business.industry ,Task force ,Magnetic resonance imaging ,United States ,Cardiovascular Diseases ,030220 oncology & carcinogenesis ,Practice Guidelines as Topic ,Radiology ,Tomography ,Dual energy ct ,Tomography, X-Ray Computed ,Nuclear medicine ,business - Abstract
This is the third of a series of 4 white papers that represent Expert Consensus Documents developed by the Society of Computed Body Tomography and Magnetic Resonance through its Task Force on dual-energy computed tomography. This paper, part 3, describes computed tomography angiography and thoracic, cardiac, vascular, and musculoskeletal clinical applications. At the end of the discussion of each application category (vascular, cardiac, pulmonary, and musculoskeletal), we present our consensus opinions on the current clinical utility of the application and opportunities for further research.
- Published
- 2017
69. Abdominal Images Non-rigid Registration Using Local-Affine Diffeomorphic Demons
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Freiman, Moti, Voss, Stephan D., Warfield, Simon Keith, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Yoshida, Hiroyuki, editor, Sakas, Georgios, editor, and Linguraru, Marius George, editor
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- 2012
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70. Improving Diagnosis and Intervention: A Complete Approach for Registration of Liver CT Data
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Erdt, Marius, Oyarzun Laura, Cristina, Drechsler, Klaus, De Beni, Stefano, Solbiati, Luigi, Hutchison, David, editor, Kanade, Takeo, editor, Kittler, Josef, editor, Kleinberg, Jon M., editor, Mattern, Friedemann, editor, Mitchell, John C., editor, Naor, Moni, editor, Nierstrasz, Oscar, editor, Pandu Rangan, C., editor, Steffen, Bernhard, editor, Sudan, Madhu, editor, Terzopoulos, Demetri, editor, Tygar, Doug, editor, Vardi, Moshe Y., editor, Weikum, Gerhard, editor, Yoshida, Hiroyuki, editor, Sakas, Georgios, editor, and Linguraru, Marius George, editor
- Published
- 2012
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71. Position paper of the EACVI and EANM on artificial intelligence applications in multimodality cardiovascular imaging using SPECT/CT, PET/CT, and cardiac CT.
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Slart, Riemer H. J. A., Williams, Michelle C., Juarez-Orozco, Luis Eduardo, Rischpler, Christoph, Dweck, Marc R., Glaudemans, Andor W. J. M., Gimelli, Alessia, Georgoulias, Panagiotis, Gheysens, Olivier, Gaemperli, Oliver, Habib, Gilbert, Hustinx, Roland, Cosyns, Bernard, Verberne, Hein J., Hyafil, Fabien, Erba, Paola A., Lubberink, Mark, Slomka, Piotr, Išgum, Ivana, and Visvikis, Dimitris
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CARDIAC radionuclide imaging , *ARTIFICIAL intelligence , *SINGLE-photon emission computed tomography , *POSITRON emission tomography computed tomography , *COMPUTED tomography , *MACHINE learning - Abstract
In daily clinical practice, clinicians integrate available data to ascertain the diagnostic and prognostic probability of a disease or clinical outcome for their patients. For patients with suspected or known cardiovascular disease, several anatomical and functional imaging techniques are commonly performed to aid this endeavor, including coronary computed tomography angiography (CCTA) and nuclear cardiology imaging. Continuous improvement in positron emission tomography (PET), single-photon emission computed tomography (SPECT), and CT hardware and software has resulted in improved diagnostic performance and wide implementation of these imaging techniques in daily clinical practice. However, the human ability to interpret, quantify, and integrate these data sets is limited. The identification of novel markers and application of machine learning (ML) algorithms, including deep learning (DL) to cardiovascular imaging techniques will further improve diagnosis and prognostication for patients with cardiovascular diseases. The goal of this position paper of the European Association of Nuclear Medicine (EANM) and the European Association of Cardiovascular Imaging (EACVI) is to provide an overview of the general concepts behind modern machine learning-based artificial intelligence, highlights currently prefered methods, practices, and computational models, and proposes new strategies to support the clinical application of ML in the field of cardiovascular imaging using nuclear cardiology (hybrid) and CT techniques. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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72. White Paper of the Society of Computed Body Tomography and Magnetic Resonance on Dual-Energy CT, Part 4
- Author
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Lincoln L. Berland, U. Joseph Schoepf, Dushyant V. Sahani, Terri J. Vrtiska, Daniel T. Boll, Desiree E. Morgan, Benjamin M. Yeh, Carlo N. De Cecco, Ravi K. Kaza, W. Dennis Foley, William P. Shuman, Neil M. Rofsky, David N. Bolus, and Marilyn J. Siegel
- Subjects
Male ,Radiography, Abdominal ,medicine.medical_specialty ,Internationality ,Digestive System Diseases ,Radiography ,Computed tomography ,Pelvis ,030218 nuclear medicine & medical imaging ,Radiography, Dual-Energy Scanned Projection ,03 medical and health sciences ,0302 clinical medicine ,White paper ,Male Urogenital Diseases ,medicine ,Humans ,Radiology, Nuclear Medicine and imaging ,Medical physics ,Evidence-Based Medicine ,medicine.diagnostic_test ,Task force ,business.industry ,Expert consensus ,Magnetic resonance imaging ,Female Urogenital Diseases ,030220 oncology & carcinogenesis ,Practice Guidelines as Topic ,Female ,Tomography ,Dual energy ct ,Radiology ,Tomography, X-Ray Computed ,business - Abstract
This is the fourth of a series of 4 white papers that represent expert consensus documents developed by the Society of Computed Body Tomography and Magnetic Resonance through its task force on dual-energy computed tomography. This article, part 4, discusses DECT for abdominal and pelvic applications and, at the end of each, will offer our consensus opinions on the current clinical utility of the application and opportunities for further research.
- Published
- 2017
73. Diagnostic criteria for idiopathic pulmonary fibrosis: a Fleischner Society White Paper.
- Author
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Lynch, David A, Sverzellati, Nicola, Travis, William D, Brown, Kevin K, Colby, Thomas V, Galvin, Jeffrey R, Goldin, Jonathan G, Hansell, David M, Inoue, Yoshikazu, Johkoh, Takeshi, Nicholson, Andrew G, Knight, Shandra L, Raoof, Suhail, Richeldi, Luca, Ryerson, Christopher J, Ryu, Jay H, and Wells, Athol U
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IDIOPATHIC pulmonary fibrosis ,LUNG biopsy ,COMPUTED tomography ,DIAGNOSIS - Abstract
Summary This Review provides an updated approach to the diagnosis of idiopathic pulmonary fibrosis (IPF), based on a systematic search of the medical literature and the expert opinion of members of the Fleischner Society. A checklist is provided for the clinical evaluation of patients with suspected usual interstitial pneumonia (UIP). The role of CT is expanded to permit diagnosis of IPF without surgical lung biopsy in select cases when CT shows a probable UIP pattern. Additional investigations, including surgical lung biopsy, should be considered in patients with either clinical or CT findings that are indeterminate for IPF. A multidisciplinary approach is particularly important when deciding to perform additional diagnostic assessments, integrating biopsy results with clinical and CT features, and establishing a working diagnosis of IPF if lung tissue is not available. A working diagnosis of IPF should be reviewed at regular intervals since the diagnosis might change. Criteria are presented to establish confident and working diagnoses of IPF. [ABSTRACT FROM AUTHOR]
- Published
- 2018
- Full Text
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74. Papers invited for International Symposium on Digital Industrial Radiology and Computed Tomography.
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COMPUTED tomography , *TELERADIOLOGY , *RADIOLOGY , *CONFERENCES & conventions , *NONDESTRUCTIVE testing , *QUANTUM computing - Abstract
The article announces the 10th International Symposium on Digital Industrial Radiology and Computed Tomography (DIR 2025), hosted by COFREND, CEA List, and DGZfP, focusing on promoting knowledge exchange and advancements in digital industrial radiology and computed tomography. Scientists, users, equipment suppliers, and academic and industrial participants interested in non-destructive testing (NDT)/non-destructive evaluation (NDE) applications are encouraged to attend.
- Published
- 2024
75. Soft tooling process chain for the manufacturing of micro-functional features on molds used for molding of paper bottles
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Anna Halina Danielak, Prateek Saxena, Kenneth Ælkær Meinert, David Bue Pedersen, Giuliano Bissacco, and Macarena Mendez Ribo
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0209 industrial biotechnology ,business.product_category ,Fabrication ,Materials science ,medicine.diagnostic_test ,business.industry ,Strategy and Management ,Functional features ,Process (computing) ,Computed tomography ,02 engineering and technology ,Molding (process) ,Management Science and Operations Research ,Time duration ,021001 nanoscience & nanotechnology ,Industrial and Manufacturing Engineering ,020901 industrial engineering & automation ,Chain (algebraic topology) ,Bottle ,medicine ,0210 nano-technology ,Process engineering ,business - Abstract
Paper-based packaging products, due to their excellent sustainable properties are preferred over the glass, plastic, and metal-based packaging solutions. The paper bottle molding process is very new in this category, and the tooling aspect is not well explored. Existing tooling solutions offer certain limitations in the molding process such as clogging of channels, low open-area fraction, low fatigue life, and longer cycle times. With the utilization of additive manufacturing techniques, the tooling can not only be made more economical and produced in shorter time duration but also more efficient. VAT photopolymerization based soft tooling process chain is highlighted and discussed in this work. Design of micro-features and their fabrication is carried out using UV light mask projection method. A characterization approach for precision manufacturing of micro-features using X-ray Computed Tomography is also discussed. Validation of the soft tooling process chain and its effectiveness against the conventional tools is presented and discussed in this work. It is shown that the proposed soft tooling process chain for the manufacturing of molds for paper bottle production is a better performing and cheaper alternative to existing solutions implemented in industry.
- Published
- 2020
76. Paper-based 3D printing of anthropomorphic CT phantoms: Feasibility of two construction techniques.
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Jahnke, Paul, Schwarz, Stephan, Ziegert, Marco, Schwarz, Felix Benjamin, Hamm, Bernd, and Scheel, Michael
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ALGORITHMS ,COMPUTED tomography ,DIAGNOSTIC imaging ,HEAD ,COMPUTERS in medicine ,IMAGING phantoms ,RESEARCH funding ,PILOT projects ,THREE-dimensional printing ,MEDICAL artifacts - Abstract
Objectives: To develop and evaluate methods for assembling radiopaque printed paper sheets to realistic patient phantoms for CT dose and image quality testing.Methods: CT images of two patients were radiopaque printed with aqueous potassium iodide solution (0.6 g/ml) on paper. Two methods were developed for assembling the paper sheets to head and neck phantoms. (1) Printed sheets were fed to a paper-based 3D printer along with corresponding 3D printable STL files. (2) Paper stacks of 5-mm thickness were glued with toner, cut to the patient shape and assembled to a phantom. In a sample application study, both phantoms were examined with five different tube current settings. Images were reconstructed using filtered-back projection (FBP) and iterative reconstruction (AIDR 3D) with three strength levels. Dose length product (DLP), signal-to-noise ratios (SNR) and contrast-to-noise ratios (CNRs) were analysed. Data were analysed using 2-way analysis of variance (ANOVA).Results: Both methods achieved anthropomorphic phantoms with detailed patient anatomy. The 3D printer yielded a precise reproduction of the external patient shape, but caused visible glue artefacts. Gluing with toner avoided these artefacts and yielded more flexibility with regard to phantom size. In the sample application study, non-inferior SNR and CNR and up to 83.7% lower DLP were achieved on the phantoms with AIDR 3D compared with FBP.Conclusions: Two methods for assembling radiopaque printed paper sheets to phantoms of individual patients are presented. The sample application demonstrates potential for simulation of patient imaging and systematic CT dose and image quality assessment.Key Points: • Two methods were developed to create realistic CT phantoms of individual patients from radiopaque printed paper sheets. • Analysis of five tube current and four reconstruction settings on two radiopaque 3D printed patient phantoms yielded non-inferior SNR and CNR and up to 83.7% lower dose with iterative reconstruction in comparison with filtered back projection. • Radiopaque 3D printed phantoms can simulate patients and allow systematic analysis of CT dose and image quality parameters. [ABSTRACT FROM AUTHOR]- Published
- 2019
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77. A Comparison of Wavelet-Based and Ridgelet-Based Texture Classification of Tissues in Computed Tomography
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Semler, Lindsay, Dettori, Lucia, Braz, José, editor, Ranchordas, Alpesh, editor, Araújo, Helder, editor, and Jorge, Joaquim, editor
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- 2007
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78. Recommendations for the Management of Incidental Hepatobiliary Findings in Adults: Endorsement and Adaptation of the 2017 and 2013 ACR Incidental Findings Committee White Papers by the Canadian Association of Radiologists Incidental Findings Working Group
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Iain D.C. Kirkpatrick, Sunit Sebastian, Jeffery R Bird, Gary Brahm, and Christopher Fung
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Adult ,Diagnostic Imaging ,Canada ,medicine.medical_specialty ,Biliary Tract Diseases ,Computed tomography ,Subspecialty ,Patient care ,Liver mass ,030218 nuclear medicine & medical imaging ,03 medical and health sciences ,0302 clinical medicine ,Humans ,Medicine ,Radiology, Nuclear Medicine and imaging ,Association (psychology) ,Biliary dilatation ,Societies, Medical ,Incidental Findings ,medicine.diagnostic_test ,Practice patterns ,business.industry ,Liver Diseases ,General surgery ,General Medicine ,030220 oncology & carcinogenesis ,Thickening ,business ,Algorithms - Abstract
The Canadian Association of Radiologists Incidental Findings Working Group consists of both academic subspecialty and general radiologists and is tasked with adapting and expanding upon the American College of Radiology incidental findings white papers to more closely apply to Canadian practice patterns, particularly more comprehensively dealing with the role of ultrasound and pursuing more cost-effective approaches to the workup of incidental findings without compromising patient care. Presented here are the 2020 Canadian guidelines for the management of hepatobiliary incidental findings. Topics covered include initial assessment of hepatic steatosis and cirrhosis, the workup of incidental liver masses identified on ultrasound and computed tomography (with algorithms presented), incidental gallbladder findings (wall thickening, calcification, and polyps), and management of incidental biliary dilatation.
- Published
- 2020
79. Concentration Measurement by Molecular Absorption Using Narrow Band Tunable Infrared Laser
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Kawaguchi, T., Hishida, K., Maeda, M., Adrian, R. J., editor, Durão, D. F. G., editor, Durst, F., editor, Heitor, M. V., editor, Maeda, M., editor, and Whitelaw, J. H., editor
- Published
- 2000
- Full Text
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80. Research in cardiac radiology: a European Society of Radiology white paper
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ESR Executive Council 2009 and ESR Working Group on Cardiac Imaging Research of the European Society of Cardiac Radiology
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- 2010
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81. Multi-modality imaging assessment of native valvular regurgitation: an EACVI and ESC council of valvular heart disease position paper
- Author
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Lancellotti, P., Pibarot, P., Chambers, J., Canna, G. la, Pepi, M., Dulgheru, R., Dweck, M., Delgado, V., Garbi, M., Vannan, M.A., Montaigne, D., Badano, L., Maurovich-Horvat, P., Pontone, G., Vahanian, A., Donal, E., Cosyns, B., European Assoc Cardiovasc Imaging, Centre Hospitalier Universitaire de Liège (CHU-Liège), Maria Cecilia Hospital [Cotignola], Anthea Hospital [Bari, Italy], Université Laval [Québec] (ULaval), Guy's and St Thomas' Hospital [London], Istituti di Ricovero e Cura a Carattere Scientifico (IRCCS), University of Edinburgh, Universiteit Leiden, University of Cambridge [UK] (CAM), Récepteurs Nucléaires, Maladies Métaboliques et Cardiovasculaires - U1011 (RNMCD), Institut Pasteur de Lille, Réseau International des Instituts Pasteur (RIIP)-Réseau International des Instituts Pasteur (RIIP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Lille-Centre Hospitalier Régional Universitaire [Lille] (CHRU Lille), Università degli Studi di Milano-Bicocca = University of Milano-Bicocca (UNIMIB), Semmelweis University of Medicine [Budapest], Laboratoire de Recherche Vasculaire Translationnelle (LVTS (UMR_S_1148 / U1148)), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris Cité (UPCité)-Université Sorbonne Paris Nord, CHU Pontchaillou [Rennes], Laboratoire Traitement du Signal et de l'Image (LTSI), Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM), Universitair Ziekenhuis Brussel = University Hospital of Brussels (UZ Brussel), Universiteit Leiden [Leiden], Récepteurs Nucléaires, Maladies Métaboliques et Cardiovasculaires (RNMCD - U1011), Università degli Studi di Milano-Bicocca [Milano] (UNIMIB), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris Cité (UPC)-Université Sorbonne Paris Nord, Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Santé et de la Recherche Médicale (INSERM), Universitair Ziekenhus Brussel (UZ Brussel), Clinical sciences, Cardio-vascular diseases, Cardiology, Lancellotti, P, Pibarot, P, Chambers, J, La Canna, G, Pepi, M, Dulgheru, R, Dweck, M, Delgado, V, Garbi, M, Vannan, M, Montaigne, D, Badano, L, Maurovich-Horvat, P, Pontone, G, Vahanian, A, Donal, E, and Cosyns, B
- Subjects
mitral valve ,cardiac magnetic resonance imaging ,Heart Valve Diseases ,Mitral Valve Insufficiency ,computed tomography ,General Medicine ,MED/11 - MALATTIE DELL'APPARATO CARDIOVASCOLARE ,tricuspid valve ,aortic valve ,Multimodal Imaging ,Tricuspid Valve Insufficiency ,valvular regurgitation ,pulmonary valve ,expert's consensu ,Echocardiography ,cardiovascular system ,Humans ,Radiology, Nuclear Medicine and imaging ,[SDV.IB]Life Sciences [q-bio]/Bioengineering ,expert's consensus ,cardiovascular diseases ,Cardiology and Cardiovascular Medicine - Abstract
Valvular regurgitation represents an important cause of cardiovascular morbidity and mortality. Imaging is pivotal in the evaluation of native valve regurgitation and echocardiography is the primary imaging modality for this purpose. The imaging assessment of valvular regurgitation should integrate quantification of the regurgitation, assessment of the valve anatomy and function, and the consequences of valvular disease on cardiac chambers. In clinical practice, the management of patients with valvular regurgitation largely relies on the results of imaging. It is crucial to provide standards that aim at establishing a baseline list of measurements to be performed when assessing native valve regurgitation. The present document aims to present clinical guidance for the multi-modality imaging assessment of native valvular regurgitation.
- Published
- 2021
82. 변형된 마스크와 유사 화소 간 그룹화를 통한 S&P 잡음 영상 복원.
- Author
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정영수 and 김남호
- Subjects
MAGNETIC resonance imaging ,IMAGE processing ,COMPUTED tomography ,INTERNET of things ,FILTER paper ,IMAGE denoising ,NOISE ,HOUGH transforms - Abstract
With the advancement of IoT(Internet of Things), image processing is being studied in various fields. Salt and pepper(S&P) noise in image acquisition devices, such as CT(Computed Tomography), MRI(Magnetic Resonance Imaging), X-ray, and scanning equipment, may develop due to environmental and physical factors, thereby distorting the original image. Numerous studies have been conducted to remove S&P noise, but existing filters have shown significantly insufficient restoration of high-density noise, low-light, and patterned images. Therefore, this paper proposes a filter high-density and low-light noise environments and preserve the patterns properties appearing in the images. In the proposed algorithm, we design local masks transformed for high-density noise and low-light images and defined the patterns represented in the images by determining and grouping similar pixels. Different filters are applied according to the pattern of similar pixel group to preserve the geometry based on its position in the input image. [ABSTRACT FROM AUTHOR]
- Published
- 2023
- Full Text
- View/download PDF
83. Paper 33: Computed Tomography Analysis of the Variation in the Medial and Lateral Posterior Tibial Slopes in Patients Undergoing Osteotomy About the Knee.
- Author
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Amendola, Richard, Ryan, Claire, Deasey, Matthew, Apostolakos, John, Provencher, Matthew, and Vidal, Armando
- Subjects
ANTERIOR cruciate ligament injuries ,SURGERY ,PATIENTS ,COMPUTED tomography ,CONFERENCES & conventions ,KNEE joint ,OSTEOTOMY ,DISEASE risk factors - Abstract
Objectives: Posterior tibial slope (PTS) is a known anatomical factor in the biomechanical function of the anterior cruciate ligament. However, when PTS is typically measured on a lateral radiograph, this does not consider potential differences between the lateral and medial tibial plateau. The difference between medial posterior tibial slope (MPTS) and lateral posterior tibial slope (LPTS) in a knee is largely unknown. Generally, computed tomography (CT) is the gold standard for 3-dimensional osseus imaging but very few studies to date have attempted to quantify the medial and lateral PTS in the same knee using CT. Clinically, it is debated whether an elevated MPTS or the LPTS is critical for anterior cruciate ligament injury and reinjury. The objective of this study was to quantify the variation in the difference between MPTS and LPTS using full tibial CT scans. Methods: At our institution, CT-assisted preoperative planning is frequently used for osteotomies. Ninety-seven patients with clinically acquired CT scans went through the preoperative planning process (Bodycad, Quebec City, Canada) from Jan 2016 to Nov 2022. This includes patients undergoing coronal, sagittal or biplanar high tibial and distal femoral osteotomies. This process is semi-automated meaning that the user can intervene with the measurements and adjust the initial landmarks and best-fit. Distally, the software will find the center of the tibiotalar joint to provide a point for the tibial axis. The user may adjust that landmark if needed. To measure the tibial slope, the software finds the best fit tibial plateau in 3D and determines the slope angle medially and laterally. The software measures the MPTS and LPTS independently. The slope measurements were compiled and quantitatively analyzed including mean, median, range as well as the difference between the MPTS and LPTS. Patients were defined to have undergone a sagittal or coronal correction if there was more than 2 degrees of change in the sagittal plane or more than 5% change in the coronal plane weight bearing line. Patients were defined as having a biplanar correction when both conditions were met. The slopes were analyzed with respect to sex and laterality. Additionally, patients undergoing an osteotomy in conjunction with an ACL reconstruction (either single or two-staged) were compared to the other patients. Results: There are differences in the MPTS and LPTS within the same knee. When analyzing the whole group, the average absolute difference is 2.76⁰ with a standard deviation of 2.49. As shown in Table 1, 40% of knees had greater than a 2.5⁰ difference in MPTS and LPTS, 19% of knees had greater than a 5⁰ difference in MPTS and LPTS, 5% of knees had greater than a 7.5⁰ difference in MPTS and LPTS and 2% of knees had greater than a 10⁰ difference in MPTS and LPTS. The magnitude of the LPTS is greater than the MPTS 52% of the time. There is no significant difference in the average, standard deviation, mean or the 10
th , 25th , 75th and 90th percentiles of the MPTS and LPTS as shown in Table 2. One hundred percent of the sagittal corrections and 84% of the biplanar corrections also underwent an ACL reconstruction in addition to an osteotomy. Characteristics of these groups of patients are shown in table 3. The sagittal and coronal osteotomy patients have a higher MPTS and LPTS than the patients undergoing a coronal osteotomy. Conclusions: The most important finding in this study is that the medial and lateral PTS can be very different within the same knee. There can be up to 11.62-degree difference in this population. Sixteen out of 97 patients had a difference of more than 5⁰ with 2 patients having a difference of greater than 10⁰. The data presented here has uncovered a description of the medial and lateral posterior tibial slope anatomy that was not evident with conventional lateral knee x-rays previously. We do not know the clinical significance of a large difference in the medial and lateral PTS and it brings forth an interesting set of clinical questions. 1) Which posterior tibial slope, medial or lateral, is most important for knee biomechanics, specifically regarding ACL stresses and function? 2) When performing a slope correcting osteotomy, is it the medial, lateral or average slope that should be the target for correction? 3) Should an intercondylar correction which only modifies one slope be considered? Further clinical studies should focus on investigating the relationship of differential PTS to native knee biomechanics as well as its implication for corrective osteotomy procedures and ACL reconstruction. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF
84. Consensus document on chronic coronary syndrome assessment and risk stratification in Portugal: A position paper statement from the [Portuguese Society of Cardiology’s] Working Groups on Nuclear Cardiology, Magnetic Resonance and Cardiac Computed Tomography, Echocardiography, and Exercise Physiology and Cardiac Rehabilitation
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Bettencourt, Nuno, Mendes, Lígia, Fontes, José Paulo, Matos, Pedro, Ferreira, Catarina, Botelho, Ana, Carvalho, Sofia, Durazzo, Anaí, Faustino, Ana, Lopes, Ricardo Ladeiras, Vasconcelos, Mariana, Vieira, Catarina, Correia, Miguel, Ferreira, António M, Ferreira, Nuno, Pires-Morais, Gustavo, Almeida, Ana G, Ferreira, Maria João Vidigal, and Teixeira, Madalena
- Subjects
Myocardial scintigraphy ,Cuidados de saúde primários ,Recomendações ,Prova de esforço ,Guidelines ,Computed Tomography ,Coronary Heart Disease ,Magnetic Resonance ,Técnicas de imagiologia cardíaca ,Cardiovascular diagnostic techniques ,Técnicas de diagnóstico cardiovascular ,Risk assessment ,General Environmental Science ,Cintigrafia de perfusão miocárdica ,Treadmill Test ,Doença coronária ,Primary Health Care ,Tomografia de emissão de positrões ,Tomografia computorizada ,Ressonância magnética ,Cardiac Imaging Techniques ,Echocardiography ,Estratificação de risco ,General Earth and Planetary Sciences ,Positron Emission Tomography ,Ecocardiografia - Abstract
Despite constant medical evolution, the reimbursement policy of Portuguese National Health Service (NHS) for the study and risk stratification of coronary heart disease has remained unchanged for several decades. Lack of adjustment to contemporary clinical practice has long been evident. However, the recent publication of the European Guidelines for diagnosis and treatment of chronic coronary syndromes further highlighted this gap and the urgent need for a change. Prompted by these Guidelines, the Working Group on Nuclear Cardiology, Cardiac Magnetic Resonance and Cardiac CT, the Working Group on Echocardiography and the Working Group on Stress Pathophysiology and Cardiac Rehabilitation of the Portuguese Society of Cardiology, began a process of joint reflection on the current limitations and how these recommendations could be applied in Portugal. To this end, the authors suggest that the new imaging methods (stress echocardiogram, cardiac computed tomography and cardiac magnetic resonance), should be added to exercise treadmill stress test and myocardial perfusion scintigraphy in the available exam portfolio within the Portuguese NHS. This change would allow full adoption of European guidelines and a better use of tests, according to clinical context, availability and local specificities. The adoption of clinical guidance standards, based on these assumptions, would translate into a qualitative improvement in the management of these patients and would promote an effective use of the available resources, with potential health and financial gains. Apesar dos avanc ̧os da medicina, há já várias décadas que os exames comparticipados pelo Servic ̧o Nacional de Saúde (SNS) para o estudo e estratificac ̧ão de risco da doenc ̧a coronária se mantêm inalterados em cuidados de saúde primários. Apesar do desajuste à prática clínica contemporânea ser há muito evidente, a recente publicac ̧ão das Recomendac ̧ões Europeias para o diagnóstico e tratamento da síndrome coronária crónica veio realc ̧ar ainda mais este desfasamento e evidenciar a necessidade imperiosa de mudanc ̧a na forma como são estudados estes pacientes em Portugal. No seguimento desta publicac ̧ão, o Grupo de Estudo de Cardiologia Nuclear, Ressonância Magnética (RM) e Tomografia Computorizada (TC) Cardíaca, o Grupo de Estudo de Ecocardiografia e o Grupo de Estudos de Patofisiologia do Esforc ̧o e Reabilitac ̧ão Car- díaca da Sociedade Portuguesa de Cardiologia iniciaram um processo de reflexão conjunta sobre as limitac ̧ões atuais e a forma como poderiam ser aplicadas as recomendac ̧ões internacionais no nosso país. Para tal, os autores sugerem que os novos métodos de imagem (ecocardiograma de esforc ̧o ou de sobrecarga, TC e RM cardíaca) se associem à prova de esforc ̧o e cintigrafia de perfusão do miocárdio no portfólio de exames oferecidos pelo SNS. Esta alterac ̧ão permitiria uma plena adoc ̧ão das recomendac ̧ões europeias e uma melhor utilizac ̧ão dos meios, de acordo com o contexto clínico, a disponibilidade e as particularidades locais. A adoc ̧ão de ‘‘normas de orientac ̧ão clínica’’ baseadas nestes pressupostos traduzir-se-ia numa melhoria qualitativa na abordagem e otimizac ̧ão terapêutica destes pacientes, ao mesmo tempo em que potenciaria uma gestão eficaz dos recursos disponíveis, com potenciais ganhos de saúde e financeiros.
- Published
- 2021
85. New Engineering Findings from Rostock University Medical Center Outlined (Eanm Position Paper On Challenges and Opportunities of Full-ring 360 Czt Bone Imaging: It's Time To Let Go of Planar Whole-body Bone Imaging).
- Subjects
BONE health ,ACADEMIC medical centers ,COMPUTED tomography ,IMAGING systems ,NUCLEAR medicine - Abstract
Researchers at Rostock University Medical Center in Germany have published a position paper on the challenges and opportunities of full-ring 360 CZT bone imaging technology. The paper provides practical recommendations for using these advanced imaging systems in routine bone SPECT/CT studies, aiming to transition from traditional planar whole-body imaging to the new systems. While the evidence base for this technology is still limited, the paper serves as a comprehensive guide for integrating these systems into clinical practice and highlights areas for further study. [Extracted from the article]
- Published
- 2024
86. Original paper Effect of a urinary catheter on seed position and rectal and bladder doses in CT-based post-implant dosimetry for prostate cancer brachytherapy
- Author
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Nanae Yamaguchi, Hiroaki Kunogi, Yoshiaki Wakumoto, and Keisuke Sasai
- Subjects
Original Paper ,medicine.medical_specialty ,urinary catheter ,medicine.diagnostic_test ,business.industry ,rectal dose ,medicine.medical_treatment ,brachytherapy ,Brachytherapy ,CT-based ,Rectum ,Computed tomography ,Post implant dosimetry ,prostate cancer ,medicine.disease ,Catheter ,Prostate cancer ,medicine.anatomical_structure ,Oncology ,medicine ,Dosimetry ,Radiology, Nuclear Medicine and imaging ,Radiology ,business ,Urinary catheter - Abstract
Purpose: To assess the variability in rectal and bladder dosimetric parameters determined according to post-implant computed tomography (CT) images in patients with or without a urethral catheter. Material and methods: Patients with prostate cancer who were scheduled to undergo CT after brachytherapy between October 2012 and January 2014 were included. We obtained CT series with and without a urinary catheter in each patient. We compared the rectal and bladder doses in 18 patients on each CT series. Results: The shifts in the seed positions between with and without a catheter in place were 1.3 ± 0.3 mm (mean ± standard deviation). The radiation doses to the rectum, as determined on the CT series, with a urethral catheter were higher than those on CT without a catheter (p < 0.001). Radiation doses to the bladder with a catheter were significantly lower than those without a catheter (p = 0.027). Conclusions: Post-implant dosimetry (PID) with no catheter showed significantly lower rectal doses and higher bladder doses than those of PID with a catheter. We recommend the PID procedure for CT images in patients without a catheter. Use of CT with a catheter is limited to identifying urethral position. J Contemp Brachytherapy 2015; 7, 3: 211-217 DOI: 10.5114/jcb.2015.52624
- Published
- 2015
87. CT staging and monitoring of fibrotic interstitial lung diseases in clinical practice and treatment trials: a Position Paper from the Fleischner society.
- Author
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Hansell, David M, Goldin, Jonathan G, JrKing, Talmadge E, Lynch, David A, Richeldi, Luca, and Wells, Athol U
- Subjects
COMPUTED tomography ,CLINICAL trials ,INTERSTITIAL lung diseases ,THERAPEUTICS - Abstract
Summary CT is increasingly being used to stage and quantify the extent of diffuse lung diseases both in clinical practice and in treatment trials. The role of CT in the assessment of patients entering treatment trials has greatly expanded as clinical researchers and pharmaceutical companies have focused their efforts on developing safe and effective drugs for interstitial lung diseases, particularly for idiopathic pulmonary fibrosis. These efforts have culminated in the simultaneous approval by the US Food and Drug Administration of two new drugs for the treatment of idiopathic pulmonary fibrosis. CT features are a key part of the inclusion criteria in many drug trials and CT is now being used to refine the type of patients enrolled. Interest in the potential use of serial CT as an effectiveness endpoint is increasing. For chronic progressive diseases, mortality may not be a feasible endpoint and many surrogate markers have been explored, ranging from pulmonary function decline to biomarkers. However, these surrogate markers are not entirely reliable and combinations of endpoints, including change in disease extent on CT, are being investigated. Methods to assess disease severity with CT range from simple visual estimates to sophisticated quantification by use of software. In this Position Paper, which cannot be regarded as a comprehensive set of guidelines in view of present knowledge, we examine the uses of serial CT in clinical practice and in drug trials and draw attention to uncertainties and challenges for future research. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
88. Lack of benefit from low dose computed tomography in screening for lung cancer - comment on paper by Huang K-L et al
- Author
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Benjamin, Don
- Subjects
Pulmonary and Respiratory Medicine ,medicine.medical_specialty ,Lung Neoplasms ,Computed tomography ,03 medical and health sciences ,0302 clinical medicine ,Lung cancer screening ,Correspondence ,medicine ,Humans ,Mass Screening ,030212 general & internal medicine ,Lung cancer ,Early Detection of Cancer ,lcsh:RC705-779 ,medicine.diagnostic_test ,business.industry ,Low dose ,Methodology ,lcsh:Diseases of the respiratory system ,medicine.disease ,Treatment Outcome ,030228 respiratory system ,Usual care ,National Lung Screening Trial ,Radiology ,Tomography, X-Ray Computed ,business ,Low dose computed tomography - Abstract
The article by Huang K-L et al. Effects of low-dose computed tomography (LDCT) screening on lung cancer contains a conclusion that is not consistent with the data presented. With reference to the National Lung Screening Trial (NLST) there are several flaws in the methodology overlooked. Also there is no significant reduction in deaths from all causes following the screening. Therefore any claim that the LDCT screening is superior to usual care is invalid.
- Published
- 2020
89. Basic Critical Care for Management of COVID-19 Patients: Position Paper of Indian Society of Critical Care Medicine, Part-I.
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Juneja, Deven, Savio, Raymond D., Srinivasan, Shrikanth, Pandit, Rahul A., Ramasubban, Suresh, Reddy, Pavan K., Singh, Manoj, Gopal, Palepu BN, Chaudhry, Dhruva, Govil, Deepak, Dixit, Shubhal, and Samavedam, Srinivas
- Subjects
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ANTIBIOTICS , *STEROID drugs , *INTENSIVE care units , *BIOMARKERS , *CLINICAL pathology , *COVID-19 , *CRITICALLY ill , *PATIENTS , *ANTIVIRAL agents , *TREATMENT duration , *CRITICAL care medicine , *HOSPITAL care , *COMPUTED tomography , *DISEASE management , *MICROBIAL sensitivity tests , *PATIENT positioning - Abstract
With more than 23 million infections and more than 814,000 deaths worldwide, the coronavirus disease-2019 (COVID-19) pandemic is still far from over. Several classes of drugs including antivirals, antiretrovirals, anti-inflammatory, immunomodulatory, and antibiotics have been tried with varying levels of success. Still, there is lack of any specific therapy to deal with this infection. Although less than 30% of these patients require intensive care unit admission, morbidity and mortality in this subgroup of patients remain high. Hence, it becomes imperative to have general principles to guide intensivists managing these patients. However, as the literature emerges, these recommendations may change and hence, frequent updates may be required. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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90. New Allergies Findings from Technical University Munich (TU Munich) Described (Endoscopic Scoring of Nasal Polyposis - Executive Summary of the Eaaci Position Paper: European Academy of Allergy and Clinical Immunology Position Paper On...).
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CLINICAL immunology ,PLACEBOS ,COMPUTED tomography ,ELECTRONIC records ,ALLERGIES - Abstract
A recent study conducted by Technical University Munich (TU Munich) in Germany has highlighted the importance of endoscopic nasal polyp scoring in the diagnosis and monitoring of chronic rhinosinusitis with nasal polyps (CRSwNP). Unlike patient-reported outcomes, endoscopic scoring provides an objective measurement that is not influenced by the placebo effect. The study emphasizes that endoscopic scoring is a safer and more cost-effective alternative to computed tomography imaging for assessing the extent of the disease. The research aims to establish a unified endoscopic nasal polyp scoring system that can serve as a reference standard for researchers and practitioners involved in managing CRSwNP. [Extracted from the article]
- Published
- 2024
91. The Effect of Fiber Orientation on Stochastic Reconstruction and Permeability of a Carbon Paper Gas Diffusion Layer.
- Author
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Gao, Yuan, Jin, Teng, Wu, Xiaoyan, and Zhang, Tong
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FIBER orientation , *CARBON paper , *DIFFUSION , *COMPUTED tomography , *PERMEABILITY , *THREE-dimensional display systems - Abstract
By analyzing the three-dimensional digital model of a real carbon paper gas diffusion layer (GDL) reconstructed by X-ray computed tomography (CT), it was found that fibers are not distributed at any angle but within a certain range. The fiber orientation can be represented by fiber pitch (i.e., the angle between a single fiber and the in-plane direction). The effect of fiber orientation on stochastic reconstruction and transport properties (permeability) was investigated in this paper to find which fiber pitch range can achieve a better GDL on fluid flow. First, the actual fiber pitch was measured by analyzing SGL-24BA images obtained by X-ray CT. Also, seven different ranges of fiber pitch were randomly chosen to reconstruct GDL. Then, the permeability of these digital models was calculated using the Lattice Bolzmann Method (LBM) and discussed to obtain the fiber pitch range of the optimal permeability. The results show that the mean fiber pitch of SGL-24BA is 2.40° and the individual values are all less than 6°, also, the permeability of the through-plane direction increases gradually as the range of fiber pitch increases, which can be used for the structural design of carbon paper GDL. [ABSTRACT FROM AUTHOR]
- Published
- 2019
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- View/download PDF
92. Assessing the Relevancy of Highly Cited Works in Neurosurgery. Part I: The 100 Most Relevant Papers in Neurosurgical Journals
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Francisco A. Ponce and Michael A. Bohl
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medicine.medical_specialty ,Medical education ,medicine.diagnostic_test ,business.industry ,Neurosurgery ,Information Storage and Retrieval ,Computed tomography ,Popularity ,Surgery ,Clinical Practice ,03 medical and health sciences ,0302 clinical medicine ,Ranking ,Bibliometrics ,030220 oncology & carcinogenesis ,Humans ,Medicine ,Neurology (clinical) ,Journal Impact Factor ,Periodicals as Topic ,business ,Citation ,030217 neurology & neurosurgery - Abstract
Background Bibliometric analyses based on total citation count come with many limitations, which investigators in other fields have overcome using the average number of citations per year since publication. Method The following study is presented in 2 parts. In this first part, the 100 most relevant articles in neurosurgical journals were identified and ranked by total citations per year since publication. We queried the Web of Science database for the 1000 most-cited articles in neurosurgical journals. The number of citations per year was calculated for these 1000 articles, and the top 100 were identified. Results Among the top 100 most relevant articles, 63 were from the Journal of Neurosurgery, 26 from Neurosurgery, 7 from the Journal of Neurology, Neurosurgery, and Psychiatry, 3 from Acta Neurochirurgica, and 1 from Surgical Neurology. The average year of publication for the 100 most relevant articles is 1995, compared with 1984 for the list of most-cited articles published by Ponce and Lozano in 2010 (P Conclusion These results suggest that ranking articles based on relevancy rather than historical popularity results in a list of more recently published articles and includes more studies addressing topics of surgical management and outcomes. The ability to appraise the literature in this fashion is worthwhile to those seeking a better understanding of the science underlying modern clinical practice and is thus a highly valuable tool for neurosurgical residents, program directors, and neuroscientists as they acquire an understanding of modern neurosurgery and its scientific foundation.
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- 2017
93. Recommendations for the Management of the Incidental Renal Mass in Adults: Endorsement and Adaptation of the 2017 ACR Incidental Findings Committee White Paper by the Canadian Association of Radiologists Incidental Findings Working Group.
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Kirkpatrick, Iain D.C., Brahm, Gary L., Mnatzakanian, Gevork N., Hurrell, Casey, Herts, Brian R., and Bird, Jeffery R.
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COMPUTED tomography , *MEDICAL referrals , *KIDNEY tumors , *RADIOLOGISTS , *ULTRASONIC imaging , *UROLOGISTS , *DISEASE incidence , *DIAGNOSIS , *TUMOR treatment - Published
- 2019
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94. Selection criteria for dental implant site imaging: A position paper of the American Academy of Oral and Maxillofacial Radiology
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null AMERICANACADEMYOFORALANDMAXI, D TYNDALL, and S BROOKS
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medicine.diagnostic_test ,business.industry ,Radiography ,medicine.medical_treatment ,Dentistry ,Computed tomography ,Oral and maxillofacial radiology ,Otorhinolaryngology ,Maxilla ,medicine ,Position paper ,Surgery ,Implant ,Tomography ,Oral Surgery ,business ,Dental implant ,General Dentistry - Abstract
The American Academy of Oral and Maxillofacial Radiology (AAOMR) has reviewed the implant imaging literature and issues this position paper for preoperative assessment of the dental implant site. The history of dental implant radiology and basic imaging principles are reviewed. An overview is presented of anatomically salient features in the maxilla and mandible germane to implant imaging, specifically to cross-sectional or transverse imaging for endosseous implants. All current modalities, including intraoral, panoramic, cephalometric, tomographic, and computed tomography, are discussed in light of the imaging data needed to select optimum implant solutions. After reviewing the current literature, the AAOMR recommends that some form of cross-sectional imaging be used for implant cases and that conventional cross-sectional tomography be the method of choice for gaining this information for most patients receiving implants.
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- 2000
95. 48-1: Invited Paper : Spectral Sensing with Computed Tomography Imaging Spectrometry
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Ralf Habel
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Physics ,Nuclear magnetic resonance ,medicine.diagnostic_test ,medicine ,Computed tomography ,Mass spectrometry - Published
- 2017
96. The use of computed tomography and X-ray fluorescence analysis in the research of printed book from the seventeenth century: book binding, tomographic reading of the text, dendrochronological dating, pigments analysis.
- Author
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Vavřík, Daniel, Kazanskii, Andrei, Neoralová, Jitka, Kindlerová, Rita Lyons, Novotná, Dana, Vávrová, Petra, Kumpová, Ivana, Vopálenský, Michal, and Kyncl, Tomáš
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X-ray spectroscopy ,COMPUTED tomography ,BOOKBINDING ,PIGMENT analysis ,SEVENTEENTH century ,INK-jet printing ,MULTISPECTRAL imaging - Abstract
This paper presents the use of X-ray computed tomography and X-ray fluorescence in the analysis and expert research of the seventeenth century printed book "Eukhologīon albo Molitoslov, ili Trebnik" from Kiev. The main purpose of the survey was to confirm whether the book binding is original or whether it is a rebinding, and whether there are any fragments of the hidden older texts. Commonly used radiography is usually not able to provide sufficient information for these purposes. On the other hand, computed tomography allows a detailed and three-dimensional documentation of the bookbinding technology and the structure of the materials used, including the wooden boards. It will be presented that all elements of the weave are clearly visible, making it possible to show that there are no internal defects in the stitching and materials. It has also been convincingly shown that there are no fragments or layers of older texts in the binding, so no further invasive intervention will be necessary regarding this aspect. The paper also demonstrates the possibility of reading the text in a closed book utilising X-ray computed tomography data; this option may be advantageous for massively damaged manuscripts. It will also be shown, that thanks to detailed tomographic imaging of the wood structure of the boards, a dendrochronological survey can be successfully carried out without invasive intervention into their outer layers. From the CT data it was also found that the pigments of the letters have significantly different densities. Therefore, as part of the survey, elemental analysis of the writing was also carried out using a portable X-ray fluorescence spectrometer to confirm and clarify this finding. [ABSTRACT FROM AUTHOR]
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- 2024
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97. Computed Tomography Dose Reduction in Children: Review Paper
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Nouf Hussain Abuhadi
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medicine.medical_specialty ,Modalities ,medicine.diagnostic_test ,business.industry ,Computed tomography ,Multiple methods ,Tube current modulation ,Medicine ,Medical physics ,Dose reduction ,Radiation protection ,business ,Cancer risk ,Automatic exposure control - Abstract
Increasing the needs of Computed Tomography (CT) for children is quietly augmented over the last decades, although its one of the most important modalities in diagnostic finalization. However, it carries a higher risk for the patient in term of radiation dose and cancer risk due to higher sensitivity to radiation than the adult. This study was conducted to review the multiple methods of dose reduction technique as presented by different authors where the different scanning protocols, machine and types of the studies were presented Here, more studies and books were selected, where they are carefully summarized and outlined into different categories for which the result stated that; the most frequent examination done in the CT department is head, neck, and sinuses in which where taken as an example of dose reduction methods. The use of the most modern technical advances was recommended in order to optimize the dose level, comfortable, constants (anesthesia if required) position and using low number of phases as possible according to the pathology of interest (low phases with better visualizations), scanning with thin collimation and view thicker as possible, increasing pitch, automatic exposure control, only the area of interest should be examined, with low tube voltage and using of tube current modulation system can give better result of dose reduction and there were multiple methods presented here. Where is most important for radiologist, technicians, and the person who conduct such studies to increase their knowledge in radiation protection, technical advances and how to interpret the different CT protocols.
- Published
- 2020
98. TBDLNet: A network for classifying multidrug‐resistant and drug‐sensitive tuberculosis.
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Zhu, Ziquan, Tao, Jing, Wang, Shuihua, Zhang, Xin, and Zhang, Yudong
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CONVOLUTIONAL neural networks ,PLURALITY voting ,FEATURE extraction ,COMPUTED tomography ,SCHEDULING ,TUBERCULOSIS - Abstract
This paper proposes applying a novel deep‐learning model, TBDLNet, to recognize CT images to classify multidrug‐resistant and drug‐sensitive tuberculosis automatically. The pre‐trained ResNet50 is selected to extract features. Three randomized neural networks are used to alleviate the overfitting problem. The ensemble of three RNNs is applied to boost the robustness via majority voting. The proposed model is evaluated by five‐fold cross‐validation. Five indexes are selected in this paper, which are accuracy, sensitivity, precision, F1‐score, and specificity. The TBDLNet achieves 0.9822 accuracy, 0.9815 specificity, 0.9823 precision, 0.9829 sensitivity, and 0.9826 F1‐score, respectively. The TBDLNet is suitable for classifying multidrug‐resistant tuberculosis and drug‐sensitive tuberculosis. It can detect multidrug‐resistant pulmonary tuberculosis as early as possible, which helps to adjust the treatment plan in time and improve the treatment effect. [ABSTRACT FROM AUTHOR]
- Published
- 2024
- Full Text
- View/download PDF
99. Papers invited for digital industrial radiology and computed tomography symposium.
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CONFERENCE papers , *RADIOLOGY , *COMPUTED tomography - Abstract
The article calls for the submission of papers in the area of digital industrial radiology and computed tomography (CT) for the International Symposium on Digital Industrial Radiology and Computed Tomography to be held from July 2-4, 2019 in Fürth, Germany.
- Published
- 2018
100. A British Society for haematology good practice paper on the diagnosis and investigation of patients with mantle cell lymphoma.
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McKay, Pamela, Leach, Mike, Jackson, Bob, Robinson, Stephen, and Rule, Simon
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MANTLE cell lymphoma , *MOLECULAR pathology , *POSITRON emission tomography , *COMPUTED tomography , *TUMOR classification , *PROGNOSIS , *DIAGNOSIS - Abstract
The article discusses the diagnosis and investigation of patients with mantle cell lymphoma (MCL. Topics covered include the latest information on molecular pathology, the use of positron emission tomography/computed tomography (PET/CT) scanning in staging and response assessment, and biological prognostic factors of MCL.
- Published
- 2018
- Full Text
- View/download PDF
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