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KAKEN_17K16484seika.pdf
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Download
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:435.9 KB
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:Mar 5, 2021 |
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Total downloads since Mar 5, 2021 : 286
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光子線治療ビーム照射時に対する体内線量投与領域のモニタリング計測の革新的技術開発
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コウシセン チリョウ ビーム ショウシャジ ニ タイスル タイナイ センリョウ トウヨ リョウイキ ノ モニタリング ケイソク ノ カクシンテキ ギジュツ カイハツ
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Kōshisen chiryō bīmu shōshaji ni taisuru tainai senryō tōyo ryōiki no monitaringu keisoku no kakushinteki gijutsu kaihatsu
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Development of delivery dose monitoring system for photon beam radiotherapy
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花田, 剛士
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ハナダ, タカシ
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Hanada, Takashi
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慶應義塾大学・医学部 (信濃町) ・講師
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Research team head
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科研費研究者番号 : 30571054
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長谷川, 智之
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ハセガワ, トモユキ
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Hasegawa, Tomoyuki
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Collaborator
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科研費研究者番号 : 10276181
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髙橋, 健太郎
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タカハシ, ケンタロウ
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Takahashi, Kentarō
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Collaborator
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2020
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科学研究費補助金研究成果報告書
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2019
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| Abstract |
高エネルギーX線による治療ビーム照射中で発生する陽電子が起因の消滅γ線放出作用を利用し、患者体内の線量投与領域情報を非侵襲で取得可能な、リアルタイムによるモニタリング計測の技術を構築することを目的とした。製作した計測装置による単一検出器の実測定では、治療ビーム照射中の大局的な信号の計測には成功したが、治療ビーム照射中の空間では大量のバックグランドが発生しコンタミネーションとして同時に計測されているため、治療ビームの照射対象に起因する消滅γ線とバックグランドの信号弁別が困難である課題があり、クリアできれば放射線治療中 (ビーム照射中) の患者体内の線量投与領域を取得できる道が開かれると考える。
In this study, a detector system consisting of crystal scintillator was designed and assessment of annihilation radiation signal emerged from prompt pair production induced by therapeutic high energy x-ray beams used in medical linear accelerator was performed. It was successfully operated to confirm the entire radiation signals by real-time measurements of counting rates, which were found to be proportional to the intensity of the photon beam. On the other hand, measurements disclosed a severe background that does not solely stem from scattered primary photons but from radiation directly emitted from the treatment head, result in no success in identifying annihilation radiation. However, by improving the techniques, the proposed method has potential that could be used for the real-time monitoring of the irradiation dose and field during the beam irradiation.
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研究種目 : 若手研究 (B)
研究期間 : 2017～2019
課題番号 : 17K16484
研究分野 : 医学物理
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