| アイテムタイプ |
文献 / Documents(1) |
| 公開日 |
2021-08-23 |
| アクセス権 |
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アクセス権 |
open access |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 出版社版DOI |
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関連識別子 |
https://doi.org/10.1002/acm2.13260 |
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関連名称 |
10.1002/acm2.13260 |
| 出版タイプ |
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出版タイプ |
VoR |
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出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| タイトル |
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タイトル |
Usability of detecting delivery errors during treatment of prostate VMAT with a gantry-mounted transmission detector |
| 著者 |
ホンダ, ヒロフミ
富永, 正英
佐々木, 幹治
笈田, 将皇
カンザキ, ヒロミツ
ハマモト, ヤスシ
イシイ, ヨシアキ
ヤマモト, リュウジ
モチヅキ, テルヒト
キド, テルヒト
宇都, 義浩
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| 抄録 |
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内容記述 |
Volumetric‐modulated arc therapy (VMAT) requires highly accurate control of multileaf collimator (MLC) movement, rotation speed of linear accelerator gantry, and monitor units during irradiation. Pretreatment validation and monitoring of these factors during irradiation are necessary for appropriate VMAT treatment. Recently, a gantry mounted transmission detector “Delta4 Discover® (D4D)” was developed to detect errors in delivering doses and dose distribution immediately after treatment. In this study, the performance of D4D was evaluated. Simulation plans, in which the MLC position was displaced by 0.5, 1.0, 1.5, 2.0, 2.5, and 3.0 mm from the clinically used original plans, were created for ten patients who received VMAT treatment for prostate cancer. Dose deviation (DD), distance‐to‐agreement (DTA), and gamma index analysis (GA) for each plan were evaluated by D4D. These results were compared to the results (DD, DTA and GA) measured by Delta4 Phantom + (D4P). We compared the deviations between the planned and measured values of the MLC stop positions A‐side and B‐side in five clinical cases of prostate VMAT during treatment and measured the GA values. For D4D, when the acceptable errors for DD, DTA, and GA were determined to be ≤3%, ≤2 mm, and ≤3%/2 mm, respectively, the minimum detectable errors in the MLC position were 2.0, 1.5, and 1.5 mm based on DD, DTA, and GA respectively. The corresponding minimum detectable MLC position errors were 2.0, 1.0, and 1.5 mm, respectively, for D4P. The deviation between the planned and measured position of MLC stopping point of prostate VMAT during treatment was stable at an average of −0.09 ± 0.05 mm, and all GA values were above 99.86%. In terms of delivering doses and dose distribution of VMAT, error detectability of D4D was comparable to that of D4P. The transmission‐type detector “D4D” is thus suitable for detecting delivery errors during irradiation. |
| キーワード |
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主題 |
prostate |
| キーワード |
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主題 |
transmission detector |
| キーワード |
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主題 |
volumetric‐modulated arc therapy |
| 書誌情報 |
en : Journal of Applied Clinical Medical Physics
巻 22,
号 7,
p. 66-76,
発行日 2021-05-05
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| 収録物ID |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
15269914 |
| 収録物ID |
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収録物識別子タイプ |
NCID |
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収録物識別子 |
AA12034060 |
| 出版者 |
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出版者 |
Wiley Periodicals |
| 出版者 |
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出版者 |
American Association of Physicists in Medicine |
| 権利情報 |
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権利情報 |
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium,provided the original work is properly cited. |
| EID |
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識別子 |
374705 |
| 言語 |
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言語 |
eng |
acm_22_7_66.pdf (696 KB)
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