Quantitative analysis of treatments using real-time image gated spot-scanning with synchrotron-based proton beam therapy system log data

Yoshimura, Takaaki; Shimizu, Shinichi; Hashimoto, Takayuki et al.

Journal of applied clinical medical physics, 2020, 21(12), 10-19

Permalink : https://hdl.handle.net/2115/80242

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https://doi.org/10.1002/acm2.13029     16

論文情報

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アクセス権
open access
URI
https://hdl.handle.net/2115/80242
タイトル
Quantitative analysis of treatments using real-time image gated spot-scanning with synchrotron-based proton beam therapy system log data
著者
Yoshimura, Takaaki ; Shimizu, Shinichi ; Hashimoto, Takayuki ; Nishioka, Kentaro ; Katoh, Norio ; Taguchi, Hiroshi ; Yasuda, Koichi ; Matsuura, Taeko ; Takao, Seishin ; Tamura, Masaya ; Tanaka, Sodai ; Ito, Yoichi M. ; Matsuo, Yuto ; Tamura, Hiroshi ; Horita, Kenji ; Umegaki, Kikuo ; Shirato, Hiroki
e-Rad_Researcher
70807742
著者名
Yoshimura, Takaaki
e-Rad_Researcher
50463724
著者名
Shimizu, Shinichi
e-Rad_Researcher
60400678
著者名
Hashimoto, Takayuki
e-Rad_Researcher
80463743
著者名
Nishioka, Kentaro
e-Rad_Researcher
80572495
著者名
Katoh, Norio
e-Rad_Researcher
90374454
著者名
Taguchi, Hiroshi
e-Rad_Researcher
00431362
著者名
Yasuda, Koichi
e-Rad_Researcher
90590266
著者名
Matsuura, Taeko
e-Rad_Researcher
10614216
著者名
Takao, Seishin
e-Rad_Researcher
40504775
著者名
Tamura, Masaya
e-Rad_Researcher
00826092
著者名
Tanaka, Sodai
e-Rad_Researcher
10334236
著者名
Ito, Yoichi M.
著者名
Matsuo, Yuto
著者名
Tamura, Hiroshi
著者名
Horita, Kenji
e-Rad_Researcher
40643193
著者名
Umegaki, Kikuo
e-Rad_Researcher
20187537
著者名
Shirato, Hiroki
言語
英語
キーワード
spot‐scanning proton beam therapy
organ motion
beam delivery efficiency
treatment time
発行日
2020-12-28
出版者
John Wiley & Sons
収録物名
Journal of applied clinical medical physics
巻(号)
21(12)
ページ
10-19
抄録
A synchrotron-based real-time image gated spot-scanning proton beam therapy (RGPT) system with inserted fiducial markers can irradiate a moving tumor with high accuracy. As gated treatments increase the beam delivery time, this study aimed to investigate the frequency of intra-field adjustments corresponding to the baseline shift or drift and the beam delivery efficiency of a synchrotron-based RGPT system. Data from 118 patients corresponding to 127 treatment plans and 2810 sessions between October 2016 and March 2019 were collected. We quantitatively analyzed the proton beam delivery time, the difference between the ideal beam delivery time based on a simulated synchrotron magnetic excitation pattern and the actual treatment beam delivery time, frequency corresponding to the baseline shift or drift, and the gating efficiency of the synchrotron-based RGPT system according to the proton beam delivery machine log data. The mean actual beam delivery time was 7.1 min, and the simulated beam delivery time in an ideal environment with the same treatment plan was 2.9 min. The average difference between the actual and simulated beam delivery time per session was 4.3 min. The average frequency of intra-field adjustments corresponding to baseline shift or drift and beam delivery efficiency were 21.7% and 61.8%, respectively. Based on our clinical experience with a synchrotron-based RGPT system, we determined the frequency corresponding to baseline shift or drift and the beam delivery efficiency using the beam delivery machine log data. To maintain treatment accuracy within +/- 2.0 mm, intra-field adjustments corresponding to baseline shift or drift were required in approximately 20% of cases. Further improvements in beam delivery efficiency may be realized by shortening the beam delivery time.
資源タイプ
学術雑誌論文
出版タイプ
Version of Record
権利情報
Creative Commons Attribution 4.0 International
PISSN
1526-9914
関連情報 (isIdenticalTo)
出版社版DOI
https://doi.org/10.1002/acm2.13029