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1,084 results on '"YOSHIDA, Kenji"'

14. Recovery of Cortical Neurotransmitter Receptor Function and Its Impact on Cognitive Improvement after Indirect Revascularization Surgery Alone for Adult Patients with Ischemic Moyamoya Disease: 123I-Iomazenil Single-Photon Emission Computed Tomography Study

Author

Yasuda, Sara, Katakura, Yasukazu, Kubo, Yoshitaka, Dobashi, Kazumasa, Kimura, Kazuto, Fujiwara, Shunrou, Chida, Kohei, Akamatsu, Yosuke, Kobayashi, Masakazu, Yoshida, Kenji, Terasaki, Kazunori, and Ogasawara, Kuniaki

Published
2022
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16. Feasibility of Backscattering Coefficient Evaluation of Soft Tissue Using High-Frequency Annular Array Probe.

Author

Choi, Jungtaek, Ketterling, Jeffrey A., Mamou, Jonathan, Hoerig, Cameron, Hirata, Shinnosuke, Yoshida, Kenji, and Yamaguchi, Tadashi

Subjects
TRANSDUCERS, BACKSCATTERING, ULTRASONIC imaging, ULTRASONICS, EVALUATION methodology
Abstract

The objective of this work is to address the need for versatile and effective tissue characterization in abdominal ultrasound diagnosis using a simpler system. We evaluated the backscattering coefficient (BSC) of several tissue-mimicking phantoms utilizing three different ultrasonic probes: a single-element transducer, a linear array probe for clinical use, and a laboratory-made annular array probe. The single-element transducer, commonly used in developing fundamental BSC evaluation methods, served as a benchmark. The linear array probe provided a clinical comparison, while the annular array probe was tested for its potential in high-frequency and high-resolution ultrasonic observations. Our findings demonstrate that the annular array probe meets clinical demands by providing accurate BSC measurements, showcasing its capability for high-frequency and high-resolution imaging with a simpler, more versatile system. [ABSTRACT FROM AUTHOR]

Published
2024
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24. MRI-guided adaptive brachytherapy in locally advanced cervical cancer (EMBRACE-I): a multicentre prospective cohort study

Author

Chargari, Cyrus, Dumas, Isabelle, Lowe, Gerry, Swamidas, Jamema, Hudej, Robert, Paulsen Hellebust, Taran, Menon, Geetha, Oinam, Arun S., Bownes, Peter, Christiaens, Melissa, De Brabandere, Marisol, Janssen, Hilde, Oosterveld, Bernard, Koedooder, Kees, Langeland Marthinsen, Anne Beate, Sundset, Marit, Whitney, Diane, Ketelaars, Martijn, Lutgens, Ludy C.H.W., Reinniers, Brigitte, Mora, Itxa, Villafranca, Elena, Antal, Gergely, Hadjiev, Janaki, Bachand, Francois, Batchelar, Deidre, Erickson, Beth, Rownd, Jason, Jacobson, Geraldine, Kim, Yusung, Anttila, Maarit, Palmgren, Jan-Erik, An, Jusheng, Assenholt, Marianne Sanggaard, Banerjee, Susovan, Bentzen, Sören, Berger, Thomas, Dankulchai, Pittaya, Diendorfer, Tamara, Dilworth, Ian, Dimopoulos, Johannes, Dörr, Elke, Ecker, Stefan, Federico, Mario, Fidarova, Elena, Fortin, Israel, Georg, Petra, Gora, Joanna, Hegazy, Neamat, Jastaniyah, Noha, Jensen, Nina Boje Kibsgaard, Liederer, Thomas, Majercakova, Katarina, Misimovic, Dragan, Motisi, Laura, Najjari Jamal, Dina, Nkiwane, Karen, Schwartz-Vittrup, Anders, Serban, Monica, Smet, Stephanie, Spampinato, Sofia, Trnkova, Petra, Valgma, Margit, Westerveld, Henrike, Wong, Joyce Siu Yu, Yoshida, Kenji, Pötter, Richard, Tanderup, Kari, Schmid, Maximilian Paul, Jürgenliemk-Schulz, Ina, Haie-Meder, Christine, Fokdal, Lars Ulrik, Sturdza, Alina Emiliana, Hoskin, Peter, Mahantshetty, Umesh, Segedin, Barbara, Bruheim, Kjersti, Huang, Fleur, Rai, Bhavana, Cooper, Rachel, van der Steen-Banasik, Elzbieta, Van Limbergen, Erik, Pieters, Bradley Rumwell, Tan, Li-Tee, Nout, Remi Abubakar, De Leeuw, Astrid Agatha Catharina, Ristl, Robin, Petric, Primoz, Nesvacil, Nicole, Kirchheiner, Kathrin, Kirisits, Christian, and Lindegaard, Jacob Christian

Published
2021
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26. Transatrial repair of a giant left ventricular pseudoaneurysm and ischaemic mitral regurgitation after myocardial infarction: case report.

Author

Monden, Yuki, Une, Dai, Furuta, Megumi, Yoshida, Kenji, and Nakai, Mikizo

Subjects
FALSE aneurysms, MITRAL valve insufficiency, MYOCARDIAL infarction, MITRAL valve surgery, MITRAL valve, PERCUTANEOUS coronary intervention, CHRONIC kidney failure
Abstract

Background Left ventricular pseudoaneurysm (LVPA) is an infrequent but highly lethal complication of myocardial infarction. Early surgical repair with a resection of pseudoaneurysm is often performed, given that medical therapy alone is associated with a high risk of mortality. This report describes a case of a giant LVPA on the lateral wall post-infarction and mitral valve regurgitation that was successfully treated by surgical transatrial closure and mitral valve replacement. Case summary A 77-year-old man with chronic kidney disease and a history of percutaneous coronary interventions for acute myocardial infarction was referred to the cardiac surgeons because of a spontaneous finding of an abnormal mass adjacent to the heart on imaging studies, which was missed on a chest radiograph obtained 3 months earlier. Cardiac studies revealed LVPA and severe mitral regurgitation with poor ejection fraction. Early repair of LVPA and concurrent mitral valve surgery were recommended. Transatrial patch closure and mitral valve replacement were performed using an interatrial approach via median sternotomy. Although the patient's post-operative course was complicated by congestive heart failure and irreversible renal failure, he was discharged with good functional status after 1 month of intermittent renal replacement therapy with haemodialysis. Discussion Transatrial repair of LVPA and concurrent mitral valve replacement can be a treatment of choice for reducing surgical trauma to the left ventricle and protecting the sealing structure from rupture. [ABSTRACT FROM AUTHOR]

Published
2024
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32. Idiopathic pulmonary hemosiderosis associated with Kabuki syndrome.

Author

Uejima, Yoji, Yoshida, Kenji, and Ohashi, Hirofumi

Subjects
CONGENITAL disorders, AUTOIMMUNE hemolytic anemia, GENETIC disorders, IDIOPATHIC diseases, JAPANESE people
Abstract

Kabuki syndrome (KS) is a genetic disorder caused by gene mutations in either lysine-specific methyltransferase 2D (KMT2D) or lysine demethylase 6A (KDM6A). This congenital disorder exhibits characteristic facial features, developmental delays in psychomotor skills, and skeletal abnormalities. Moreover, it is classified as a congenital immunodeficient disorder under the category of combined immunodeficiency, leading to hypogammaglobulinemia and the onset of autoimmune diseases. Here, we present the first case of KS complicated by idiopathic pulmonary hemosiderosis (IPH). The KS patient, a 2-year-old Japanese girl with a history of hypoplastic left heart syndrome and recurrent bacterial infection, developed severe respiratory distress and anemia. She had autoimmune hemolytic anemia and gouty nephropathy. Hemophagocytic macrophages with hemosiderin ingestion were identified in bronchoalveolar lavage fluid, excluding differential diagnoses and leading to the diagnosis of idiopathic pulmonary hemosiderosis. Intravenous prednisolone (2 mg/kg/day) was administered, but symptoms did not improve. However, pulmonary hemorrhage disappeared with methylprednisolone pulse therapy. IPH warrants consideration in cases where individuals with KS manifest idiopathic pneumonia and concurrent anemia. [ABSTRACT FROM AUTHOR]

Published
2024
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33. Status of the LHCf experiment

Author

Ohashi Ken, Adriani Oscar, Berti Eugenio, Betti Pietro, Bonechi Lorenzo, Bongi Massimo, D’Alessandro Raffaello, Detti Sebastiano, Haguenauer Maurice, Itow Yoshitaka, Kasahara Katsuaki, Kitagami Yuga, Kondo Moe, Matsubara Yutaka, Menjo Hiroaki, Muraki Yasushi, Papini Paolo, Piparo Giuseppe, Ricciarini Sergio, Sako Takashi, Sakurai Nobuyuki, Scaringella Monica, Shimizu Yuki, Tamura Tadashi, Tiberio Alessio, Torii Shoji, Tricomi Alessia, Turner William C., and Yoshida Kenji

Subjects
Physics, QC1-999
Abstract

A precise understanding of hadronic interactions is essential to interpreting the mass composition of ultra-high energy cosmic rays from the results of air shower experiments. The Large Hadron Collier forward (LHCf) experiment aims to measure forward neutral particles for validation of hadronic interaction models adopted in air shower simulations. We already published the production cross sections of forward photons and neutrons for proton-proton collisions at √s=13 TeV. Recently, we showed a preliminary result of the energy spectrum of forward η mesons for proton-proton collisions at √s=13 TeV. Moreover, in September 2022, we had another data-taking for proton-proton collisions at √s=13.6 TeV. In data taking, we planned to obtain a number of π0 and η candidates ten times larger for precise measurements and to perform the joint operation with ATLAS Roman pots and zero-degree calorimeters. Thanks to the joint operation with the ATLAS Roman pots, we can measure diffractive mass and neutral particles from diffractive dissociation simultaneously. Furthermore, energy resolution for neutrons is expected to be improved from 40% to 20% by combining the LHCf and the ATLAS zero-degree calorimeters. In this work, we report the status and prospects of the LHCf experiment.

Published
2023
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34. Performance evaluation of LHCf-ATLAS ZDC joint measurement using proton beam

Author

Kondo Moe, Adriani Oscar, Berti Eugenio, Betti Pietro, Bonechi Lorenzo, Bongi Massimo, D’Alessandro Raffaello, Detti Sebastiano, Haguenauer Maurice, Itow Yoshitaka, Kasahara Katsuaki, Kitagami Yuga, Matsubara Yutaka, Menjo Hiroaki, Muraki Yasushi, Ohashi Ken, Papini Paolo, Piparo Giuseppe, Ricciarini Sergio, Sako Takashi, Sakurai Nobuyuki, Scaringella Monica, Shimizu Yuki, Tamura Tadashi, Tiberio Alessio, Torii Shoji, Tricomi Alessia, Turner William C., Yoshida Kenji, Citron Zvi, Cole Brian, Grosse-Perdekamp Matthias, Lantz Chad, Longo Riccardo, MacLean Daniel, Moyal Yftach, Shenkar Shir, Steinberg Peter, Sudit Lion, and Tate Aric

Subjects
Physics, QC1-999
Abstract

Measurements of forward neutrons in pp collisions will allow us to investigate π-p cross-section via one-pion exchange process, which are important for air shower development. However, the precision of these measurements is limited by the energy resolution of the LHCf detectors. To improve it, a joint measurement with the ATLAS ZDC was planned. In 2021, a beam test was conducted to evaluate the performance of the joint measurement of the LHCf-Arm1 and ZDC detectors using proton beams of 350 GeV at SPS. Combining the LHCf data with the ZDC data, we confirmed that the energy resolution improved from about 40% to 21.4%.

Published
2023
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39. Targeting Anterior Commissure Involvement with Hyperfractionated Radiotherapy for T1–T2 Squamous Cell Carcinoma of the Glottic Larynx.

Author

Seno, Satoshi, Iwashita, Kazuma, Kajiwara, Akifumi, Sasaki, Rie, Furukawa, Tatsuya, Teshima, Masanori, Shinomiya, Hirotaka, Kiyota, Naomi, Lynch, Rod, Yoshida, Kenji, Ishihara, Takeaki, Miyawaki, Daisuke, Nibu, Ken-ichi, and Sasaki, Ryohei

Subjects
SQUAMOUS cell carcinoma, RADIOTHERAPY, RESEARCH funding, SURVIVAL rate, HEAD & neck cancer, LARYNGEAL tumors, TREATMENT effectiveness, DESCRIPTIVE statistics, GLOTTIS, OVERALL survival, EVALUATION
Abstract

Simple Summary: Anterior commissure involvement (ACI) is an important factor in the local control of early-stage glottic squamous cell carcinoma (EGSCC). We initiated a radiotherapeutic treatment regimen focusing on ACI, which has included hyperfractionated radiotherapy since 2008. One-hundred and fifty-three patients with T1–T2 EGSCC were included in this study. Hyperfractionated radiotherapy (74.4 Gy in 62 fractions) was used for EGSCC with ACI. The 10-year overall survival and cause-specific survival rates were 72% and 97%, respectively. The 10-year local control rates were 94% for T1a, 88% for T1b, and 81% for T2 disease. Local control rates in patients with ACI were slightly better than those in patients without ACI with T1a and T1b diseases; however, the difference was not significant. The 10-year laryngeal preservation rate was 96%. In conclusion, hyperfractionated radiotherapy was effective for T1 disease with ACI but insufficient for T2 disease with ACI. Our treatment strategy resulted in excellent laryngeal preservation. Anterior commissure is involved in about 20% of early-stage glottic squamous cell carcinomas (EGSCCs). Treatment outcomes and prognostic factors for EGSCC with anterior commissure involvement (ACI) were evaluated by focusing on hyperfractionated radiotherapy (74.4 Gy in 62 fractions). One-hundred and fifty-three patients with T1–T2 EGSCC were included in this study. The median total doses for T1a, T1b, and T2 were 66, 74.4, and 74.4 Gy, respectively. Overall, 49 (32%) patients had T1a, 38 (25%) had T1b, and 66 (43%) had T2 disease. The median treatment duration was 46 days. The median follow-up duration was 5.1 years. The 10-year overall and cause-specific survival rates were 72% and 97%, respectively. The 10-year local control rates were 94% for T1a, 88% for T1b, and 81% for T2 disease. Local control rates in patients with ACI were slightly better than those in patients without ACI with T1a and T1b diseases; however, the difference was not significant. The 10-year laryngeal preservation rate was 96%. Six patients experienced grade 3 mucositis, and four patients had grade 3 dermatitis. Hyperfractionated radiotherapy was effective for T1 disease with ACI, but insufficient for T2 disease with ACI. Our treatment strategy resulted in excellent laryngeal preservation. [ABSTRACT FROM AUTHOR]

Published
2024
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41. V-cavity stabilized quantum cascade laser-based cavity ringdown spectroscopy for rapid detection of radiocarbon below natural abundance.

Author

Terabayashi, Ryohei, Saito, Keisuke, Sonnenschein, Volker, Okuyama, Yuki, Iwamoto, Kazuki, Mano, Kazune, Kawashima, Yuta, Furumiya, Tetsuo, Tojo, Koji, Ninomiya, Shinichi, Yoshida, Kenji, and Tomita, Hideki

Subjects
ACCELERATOR mass spectrometry, OPTICAL feedback, QUANTUM cascade lasers, CARBON isotopes, TRACE analysis, OPTICAL resonators, LASER spectroscopy
Abstract

Mid-infrared laser absorption spectroscopy utilizing a high-finesse optical cavity enables high precision trace analysis of gas molecules. In particular, optical detection of radiocarbon (14C) based on cavity ringdown spectroscopy using a quantum cascade laser (QCL) is gaining attention as an alternative to accelerator mass spectrometry. This paper reports a compact-packaged narrow-linewidth QCL system utilizing resonant optical feedback from an external V-shaped cavity. Based on frequency noise analysis, the derived laser linewidth is 44 kHz for 100 μs integration time with the capability to perform seamless frequency scanning around 10 GHz. We installed this laser system within a table-top cavity ringdown spectrometer for 14CO2. A single-shot detection limit of 1.2 × 10−9 cm−1 Hz−1/2 leading to a detectable abundance evaluated from a noise analysis of 0.2 in fraction modern 14C for a 10-s averaging time was achieved. This capability of rapid analysis for 14CO2 is suitable for various applications requiring trace 14C analysis. [ABSTRACT FROM AUTHOR]

Published
2022
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