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Characteristic of the range verification system using scintillator and CCD camera system
https://repo.qst.go.jp/records/71748
https://repo.qst.go.jp/records/71748e75a9d4d-1ce4-40d8-a236-13df19fa3a36
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2015-06-30 | |||||
| タイトル | ||||||
| タイトル | Characteristic of the range verification system using scintillator and CCD camera system | |||||
| 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_c94f | |||||
| 資源タイプ | conference object | |||||
| 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 |
Saotome, Naoya
× Saotome, Naoya× Hara, Yousuke× Mizushima, Kota× Tansho, Ryohei× Saraya, Yuichi× Furukawa, Takuji× Shirai, Toshiyuki× Noda, Koji× 早乙女 直也× 原 洋介× 水島 康太× 丹正 亮平× 皿谷 有一× 古川 卓司× 白井 敏之× 野田 耕司 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Purpose National Institute of Radiological Sciences have been commissioning the irradiation method that employs more than 200 multiple beam energies supplied by synchrotron instead of the energy degraders. The accuracy of the beam energy/range is required for heavy ion treatment especially for using scanning method. ICRU78 recommend checking the range constancy for daily QA. Therefore easy and simple range verification system is required. The purpose of this work is to develop range verification system using scintillator and CCD (charge-coupled device) camera and to estimate the accuracy of the range verification using the system. Material and methods Using proposed system, projected depth dose distribution could be provided by one measurement. A EJ-200 plastic scintillator block was selected for obtained pure tranceparent block. The scintillator was mounted in the black box in order to shade a light in the room. The CCD camera (Type BU-41L, 1360x1024 pixels, Bitran Corp., Japan) was installed perpendicular to the beam axis. Therefore two-dimensional image projected depth dose distribution is provided by measurement. Total 131 mono-energy carbon beams that are in the range from 56 to 332 MeV/n were tested. The range resolution test was performed using range shifter made by PMMA plate placed upstream of the system. Edge positions at the distal region that were detected by image processing were compared with expected position. Result Measurement time was about 9 minutes for 131 energy beams. Peak-entrance ratio was small due to quenching effect and absorption of the light within the scintillator block. The 1 mm range difference was clearly divided. Standard deviation of repeating measurement was less than 0.3 mm. The difference of fluence with normal treatment operation didn’t effect the range verification. Conclusion The range check system using scintillator and CCD have nice characteristics for range verification with short time. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | The 7th Korea-Japan Joint Meeting on Medical Physics | |||||
| 発表年月日 | ||||||
| 日付 | 2014-09-25 | |||||
| 日付タイプ | Issued | |||||
