| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2025-04-28 |
| タイトル |
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タイトル |
Optimization of a YAP(Ce) prompt X-ray camera for imaging with spot scanning proton beams at clinical dose levels |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 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 |
| 著者 |
Yamamoto Seiichi (Waseda Univ.)
Yamashita Tomohiro (Kobe Proton Center)
Kobayashi Yusuke (Kobe Proton Center)
Yabe Takuya
Akagi Takashi (Hyogo Ion Beam Medical Center)
Yamaguchi Mitsutaka
Kawachi Naoki
Kamada Kei (Tohoku Univ.)
Yoshikawa Akira (Tohoku Univ.)
Kataoka Jun (Waseda Univ.)
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Prompt secondary electron bremsstrahlung X-ray (prompt X-ray) imaging using a low-energy X-ray camera is a promising method for observing the beam shape from outside a subject. However, it has sometimes been necessary to conduct such imaging at a higher dose than the clinical level to acquire images with acceptable quality. To solve this problem, we optimized a prompt X-ray imaging system to use for spot scanning proton therapy system. The new camera had more than one order higher sensitivity to image several types of beams, including those at the clinical dose level. The optimized prompt X-ray imaging system uses a 4 mm diameter pinhole collimator to increase sensitivity, and it is combined with a larger YAP(Ce) scintillator to increase the magnification ratio and thus improve spatial resolution. We used a list-mode data-acquisition system with high count rate capability. Prompt X-ray images were acquired by irradiating a water phantom with proton beams from the spot scanning proton therapy system. Measurements were taken for pencil beams, spread-out Bragg peak (SOBP) beams, and a beam utilized in actual clinical therapy. For all of the beams, we could measure scanning spot images within a spill and evaluate the ranges for the accumulated images at the clinical dose level. From the list-mode data, we measured the temporarily altered positions of the scanning beams as well as the accumulations of the prompt X-ray images. The optimized prompt X-ray imaging system could improve sensitivity while maintaining better spatial resolution. The new system realized prompt X-ray imaging at the clinical dose level and holds promise for future clinical imaging of prompt X-rays. |
| 書誌情報 |
Journal of Instrumentation (JINST)
巻 18,
p. T12005,
発行日 2023-04
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| 出版者 |
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出版者 |
IOP Publishing |
| ISSN |
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収録物識別子タイプ |
ISSN |
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収録物識別子 |
1748-0221 |
| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1088/1748-0221/18/12/T12005 |
