Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Shusuke Hirayama"'
Autor:
Hiroki Shirato, Takahiro Yamada, Yusuke Fujii, Seishin Takao, Shusuke Hirayama, Isao Yokota, Shinichi Shimizu, Kikuo Umegaki, Norio Katoh, Hideaki Nihongi, Hidenori Koyano, Taeko Matsuura, Naoki Miyamoto
Publikováno v:
Journal of Radiation Research
In spot scanning proton therapy (SSPT), the spot position relative to the target may fluctuate through tumor motion even when gating the radiation by utilizing a fiducial marker. We have established a procedure that evaluates the delivered dose distr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::3b5640b58140232faf4e3560d86e0660
https://doi.org/10.1093/jrr/rrab024
https://doi.org/10.1093/jrr/rrab024
Autor:
Takaaki Fujii, Taeko Matsuura, Kikuo Umegaki, Shinichi Shimizu, Seishin Takao, Shusuke Hirayama, Koichi Yasuda, Naoki Miyamoto
Publikováno v:
Journal of Applied Clinical Medical Physics
Purpose While a large amount of experimental data suggest that the proton relative biological effectiveness (RBE) varies with both physical and biological parameters, current commercial treatment planning systems (TPS) use the constant RBE instead of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2012db8414d8fc7a719ca37c8f074d89
https://doi.org/10.1002/acm2.12844
https://doi.org/10.1002/acm2.12844
Autor:
Naoki Miyamoto, Miyazaki Koichi, Taeko Matsuura, Koki Kasamatsu, Hidefumi Aoyama, Seishin Takao, Shusuke Hirayama, Kikuo Umegaki, Kentaro Nishioka, Takayuki Hashimoto, Sodai Tanaka
Publikováno v:
Medical physicsREFERENCES. 49(1)
PURPOSE In the scanning beam delivery of protons, different portions of the target are irradiated with different linear energy transfer protons with various time intervals and irradiation times. This research aimed to evaluate the spatially dependent
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::88ece12cccd7edc61e7366e9968b1876
https://pubmed.ncbi.nlm.nih.gov/34796522
https://pubmed.ncbi.nlm.nih.gov/34796522
Autor:
Koki Ueno, Takaaki Yoshimura, Yuto Matsuo, Taeko Matsuura, Seishin Takao, Shusuke Hirayama, Hideaki Ueda, Kikuo Umegaki
Publikováno v:
Journal of Applied Clinical Medical Physics
To improve the penumbra of low‐energy beams used in spot‐scanning proton therapy, various collimation systems have been proposed and used in clinics. In this paper, focused on patient‐specific brass collimators, the collimator‐scattered proto
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1096509650fcc07205dc9f819d9ea42b
https://doi.org/10.1002/acm2.12653
https://doi.org/10.1002/acm2.12653
Publikováno v:
Journal of Applied Clinical Medical Physics
Purpose The purpose of this study is to improve dose calculation accuracy of the simplified Monte Carlo (SMC) algorithm in the low‐dose region. Because conventional SMC algorithms calculate particle scattering in consideration of multiple Coulomb s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8526a08c7b001c8b1630bed6728b6d9b
https://doi.org/10.1002/acm2.12221
https://doi.org/10.1002/acm2.12221
Autor:
Shinichiro Fujitaka, Shusuke Hirayama, Yoshihiko Nagamine, Keisuke Yasui, Taisuke Takayanagi, Masahiro Hosaka, Rintaro Fujimoto, Toshiyuki Toshito, Masumi Umezawa, Chihiro Omachi, Yusuke Fujii
Publikováno v:
Medical Physics. 43:1437-1450
Purpose: The main purpose in this study was to present the results of beam modeling and how the authors systematically investigated the influence of double and triple Gaussian proton kernel models on the accuracy of dose calculations for spot scannin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::64b66dec9f62d7a09d9a38129e956cc2
https://doi.org/10.1118/1.4942386
https://doi.org/10.1118/1.4942386
Publikováno v:
Physica medica : PM : an international journal devoted to the applications of physics to medicine and biology : official journal of the Italian Association of Biomedical Physics (AIFB). 67
Purpose We propose a new spread-out Bragg peak (SOBP) formation method for low-energy regions of spot-scanning proton therapy in order to reduce the required number of energy layers while maintaining high dose uniformity, while maintaining the distal
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::224d201de277f02a73f082d5363e32b1
https://pubmed.ncbi.nlm.nih.gov/31678799
https://pubmed.ncbi.nlm.nih.gov/31678799
Autor:
Yoshihiko Nagamine, Kensuke Hayashi, Yuta Shibamoto, Shigeru Isoyama, Toshiyuki Toshito, Yusuke Fujii, Kumiko Asai, Chihiro Omachi, Akira Shimomura, Taisuke Takayanagi, Shusuke Hirayama, Hideto Kinou, Masataka Komori, H. Shibata, Eiki Nikawa, J.E. Mizoe, K. Yasui, Yoshiaki Kibe, K. Tanaka
Publikováno v:
Medical Physics. 42:6999-7010
Purpose: In the authors’ proton therapy system, the patient-specific aperture can be attached to the nozzle of spot scanning beams to shape an irradiation field and reduce lateral fall-off. The authors herein verified this system for clinical appli
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8bb6bd5c85568618732587c4c6af548d
https://doi.org/10.1118/1.4935528
https://doi.org/10.1118/1.4935528
Autor:
Takaaki Fujii, Hiroki Shirato, Seishin Takao, Naoki Miyamoto, Shusuke Hirayama, Kikuo Umegaki, Taeko Matsuura, Yusuke Fujii, Shinichi Shimizu, Rintaro Fujimoto, Hideaki Ueda
Publikováno v:
Medical physics. 45(7)
Purpose To evaluate the biological effects of proton beams as part of daily clinical routine, fast and accurate calculation of dose-averaged linear energy transfer (LETd ) is required. In this study, we have developed the analytical LETd calculation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::121b3d4cbb3967b45f57796c68e70844
https://pubmed.ncbi.nlm.nih.gov/29788552
https://pubmed.ncbi.nlm.nih.gov/29788552
Autor:
Yukinobu Watanabe, Shusuke Hirayama, Hiroshi Umishio, Yuuki Naitou, Masateru Hayashi, Riccardo Bevilacqua, Vasily Simutkin, Stephan Pomp, Cecilia Gustavsson, Michael Österlund, Anders Hjalmarsson, Alexander Prokofiev, Udomrat Tippawan
Publikováno v:
Progress in Nuclear Science and Technology. 4:569-573
Double-differential cross sections of light ions (p, d, t, 3 He, and α) from carbon, oxygen, and silicon induced by 175 MeV quasi mono-energetic neutrons were measured using the Medley setup at the The Svedberg Laboratory (TSL) in order to benchmark
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::427f0d9f2946ec1543e3b031b140af53
https://doi.org/10.15669/pnst.4.569
https://doi.org/10.15669/pnst.4.569