Zobrazeno 1 - 10
of 140
pro vyhledávání: '"Shuichi Ozawa"'
Autor:
Hideharu Miura, PhD, Masahiro Kenjo, MD, PhD, Yoshiko Doi, MD, PhD, Taro Ueda, MD, Minoru Nakao, PhD, Shuichi Ozawa, PhD, Yasushi Nagata, MD, PhD
Publikováno v:
Advances in Radiation Oncology, Vol 8, Iss 6, Pp 101264- (2023)
Purpose: We evaluated the dosimetric effect of tumor changes in patients with fractionated brain stereotactic radiation therapy (SRT) on the tumor and normal brain using repeat verification magnetic resonance imaging (MRI) in the middle of the treatm
Externí odkaz:
https://doaj.org/article/b99e2042b149471981e55c96e8e7d9e1
Publikováno v:
Physics and Imaging in Radiation Oncology, Vol 23, Iss , Pp 153-156 (2022)
A combination of a three-dimensional conformal radiation therapy (3D-CRT) plan with a dose gradient of the chest wall area and a volumetric modulated arc therapy (VMAT) plan of the supraclavicular area might improve the dose distribution robustness i
Externí odkaz:
https://doaj.org/article/280d8fc7a9be475d868646e668776842
Autor:
Katsumaro Kubo, Masahiro Kenjo, Hideo Kawabata, Koichi Wadasaki, Mitsuru Kajiwara, Yoshiko Doi, Minoru Nakao, Hideharu Miura, Shuichi Ozawa, Yasushi Nagata
Publikováno v:
Journal of Medical Case Reports, Vol 15, Iss 1, Pp 1-8 (2021)
Abstract Background Few studies have assessed hydrogel spacer shrinkage during external-beam radiation therapy following brachytherapy for localized high-risk prostate cancer. This case presentation evaluated the changes in hydrogel spacer appearance
Externí odkaz:
https://doaj.org/article/dffa8fc0c7c14bdca207cfd7c429449e
Autor:
Shogo Tsunemine, Shuichi Ozawa, Minoru Nakao, Hideharu Miura, Akito Saito, Daisuke Kawahara, Yasuhiko Onishi, Takashi Onishi, Fumito Okawa, Atsushi Terai, Taiki Hashiguchi, Hidetoshi Yamasaki, Tsutomu Maruta, Yuji Murakami, Yasushi Nagata
Publikováno v:
Journal of Radiation Research. 64:195-201
Daily dose distributions for adaptive radiotherapy (ART) using helical tomotherapy (HT) are calculated using megavoltage computed tomography (MVCT). Generally, the MVCT number is converted to mass density (MD) using an MD calibration table (MVCT-MD t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1f9e7c6bb8dc3b3a5d641cb8e730aa3d
https://doi.org/10.1093/jrr/rrac071
https://doi.org/10.1093/jrr/rrac071
Autor:
Minoru, Nakao, Masahiro, Hayata, Shuichi, Ozawa, Hideharu, Miura, Kiyoshi, Yamada, Daisuke, Kawahara, Kentaro, Miki, Takeo, Nakashima, Yusuke, Ochi, Shintaro, Tsuda, Mineaki, Seido, Yoshiharu, Morimoto, Atsushi, Kawakubo, Hiroshige, Nozaki, Kosaku, Habara, Yasushi, Nagata
Publikováno v:
Physica Medica. 99:22-30
Treatment planning for ion therapy involves the conversion of computed tomography number (CTN) into a stopping-power ratio (SPR) relative to water. The purpose of this study was to create a CTN-to-SPR calibration table using a stoichiometric CTN cali
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5651dfbfd75b61602ae36951a0dc6a14
https://doi.org/10.1016/j.ejmp.2022.05.005
https://doi.org/10.1016/j.ejmp.2022.05.005
Publikováno v:
Journal of Applied Clinical Medical Physics.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::58be107dfe6a26a4cbd8cb8f8d452d9b
https://doi.org/10.1002/acm2.13992
https://doi.org/10.1002/acm2.13992
Publikováno v:
Medical Dosimetry. 47:48-53
The aim of this study was to compare the quality of dynamic wave arc (DWA) and coplanar volumetric modulated arc therapy (co-VMAT) plans for the treatment of localized prostate cancer. The planning target volume (PTV)-rectum, a section of the PTV com
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6bd870bc901f3c7a2ce07293b793ccec
https://doi.org/10.1016/j.meddos.2021.08.001
https://doi.org/10.1016/j.meddos.2021.08.001
Autor:
Hideharu Miura, Fumika Takeichi, Tsubasa Enosaki, Kiyoshi Yamada, Shuichi Ozawa, Yasushi Nagata
Publikováno v:
Polish Journal of Medical Physics and Engineering. 27:299-302
Purpose: This study was conducted to demonstrate the feasibility of X-ray output constancy quality assurance (QA) of a linear accelerator for various gantry angles using the Stealth Chamber. Methods: The X-ray output constancy of a Varian TrueBeam ST
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a2c6f61e9e45ca869c3c0055439f8155
https://doi.org/10.2478/pjmpe-2021-0035
https://doi.org/10.2478/pjmpe-2021-0035
Autor:
Takaaki Matsuura, Daisuke Kawahara, Akito Saito, Kiyoshi Yamada, Shuichi Ozawa, Yasushi Nagata
Publikováno v:
Medical physics.
Artificial intelligence (AI)-based gamma passing rate (GPR) prediction has been proposed as a time-efficient virtual patient-specific QA method for the delivery of volumetric modulation arc therapy (VMAT). However, there is a limitation that the GPR
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e3853ce2d8fa34ea89e7770ec6c7d383
https://pubmed.ncbi.nlm.nih.gov/36609669
https://pubmed.ncbi.nlm.nih.gov/36609669
Autor:
Shogo, Tsunemine, Shuichi, Ozawa, Minoru, Nakao, Hideharu, Miura, Akito, Saito, Daisuke, Kawahara, Yasuhiko, Onishi, Takashi, Onishi, Taiki, Hashiguchi, Yoshihisa, Matsumoto, Tsutomu, Maruta, Yuji, Murakami, Yasushi, Nagata
Publikováno v:
Journal of Applied Clinical Medical Physics. 24
This study aims to evaluate the effect of different air computed tomography (CT) numbers of the image value density table (IVDT) on the retrospective dose calculation of head-and-neck (HN) radiotherapy using TomoTherapy megavoltage CT (MVCT) images.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dd1bdd117173047893acce250cc5bcaa
https://doi.org/10.1002/acm2.13835
https://doi.org/10.1002/acm2.13835