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Time-resolved dosimetry with pencil-beam scanning for quality assurance/quality control in particle therapy
https://repo.qst.go.jp/records/84666
https://repo.qst.go.jp/records/84666d4b98234-8baf-4b1c-aa0a-5c7a553f2df3
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2021-10-20 | |||||
| タイトル | ||||||
| タイトル | Time-resolved dosimetry with pencil-beam scanning for quality assurance/quality control in particle therapy | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Han, Soorim
× Han, Soorim× Takuji, Furukawa× Yousuke, Hara× Shigekazu, Fukuda× Han, Soorim× Takuji, Furukawa× Yousuke, Hara× Shigekazu, Fukuda |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | This study aimed to measure dose in a scanning carbon beam-irradiation field with high sampling rate that is sufficient for identifying spots and verifying the characteristics of the scanning beam that cannot generally be derived from the dose. To identify the spot, which is the smallest control unit of beam information during irradiation, effecting measurements with a sampling time of 10 μs or shorter is necessary. The provided dose within a specific time is referred to as time-resolved dose (TRD).We designed a circuit for time-resolved dosimetry using a fast-data acquisition unit (SL1000, Yokogawa Electric Co.), which can measure 100 000 samples per second. Moreover, we used converters to enable a connection between an ionization chamber (IC) and the SL1000.TRD was measured successfully using point irradiation and two-dimensional irradiation patterns in a scanned carbon beam. Based on the moving time of the spot obtained from the position monitor, the dose delivered to the IC from each spot position (spot dose) was interpreted. The spot dose, displacement of the chamber from the beam’s center axis, and beam size were derived using TRD and position monitor outputs, which were measured concurrent with TRD. Spot dose up to a radius of 8 mm area from the IC’s center were observed. Using the spotdose equations and simulation, we show that the spot dose of each position varies depending on the beam size and displacement of the IC’s center from the beam’s center axis.We devise an interpretation method for the characteristics that may apply to quality assurance, such as the verification of the trend for the beam axis and isocenter to coincide, as well as beam-size verification. |
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| 書誌情報 |
Journal of Applied Clinical Medical Physics 巻 22, 号 11, p. 12-20, 発行日 2021-11 |
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| 出版者 | ||||||
| 出版者 | AAPM | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1526-9914 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1002/acm2.13397 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://aapm.onlinelibrary.wiley.com/doi/full/10.1002/acm2.13397 | |||||
