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Isocenter Verification of a Compact Rotating Gantry for Carbon Ion Therapy
https://repo.qst.go.jp/records/72422
https://repo.qst.go.jp/records/72422dad2cfe7-6f30-4524-9e15-011e495241dd
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2017-08-25 | |||||
| タイトル | ||||||
| タイトル | Isocenter Verification of a Compact Rotating Gantry for Carbon Ion 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_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× Furukawa, Takuji× Saraya, Yuichi× Mizushima, Kota× Hara, Yousuke× Tansho, Ryohei× Shirai, Toshiyuki× Noda, Koji× 早乙女 直也× 古川 卓司× 皿谷 有一× 水島 康太× 原 洋介× 丹正 亮平× 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: At the National Institute of Radiological Sciences (NIRS), we have been commissioning the rotating- gantry system for the carbon-ion radiotherapy in 2015. It is world’s first rotating-gantry with super-conducting magnet and achieved a more compact, lighter rotating gantry than the typical gantry. During the commissioning of the rotating gantry, we adjusted the beam position using a steel sphere located at isocenter and verified the accuracy using a scintillation screen and CCD system. We employ the digital QA system to verify the geometrical accuracy easily and quickly. \nMethods: The 300 ton rotating gantry can deliver carbon ions having 430 MeV/u to the isocenter over 360 degrees, having the capability of performing three-dimensional scanning irradiation. the mechanical isocenter was verified using the laser tracker system. To verify the coincidence of the isocenter for irradiation system and the patient positioning system, we used a steel sphere located at isocenter. As a part of the verifying of the treatment beam position, scintillation screen viewed by a CCD camera mounted on the gantry downstream of the sphere. Total 201energy carbon beams with that were in the range from 48 to 430 MeV/u were measured sequentially. A starshot test was also performed to verify the gantry angle and beam direction visually using a scintillator block and a CCD camera. For the starshot test, 13 beam energy were selected. \nResults: From the result of the test using a sphere, the maximum displacement of the beam position was within 0.5mm at all gantry angles. The gantry starshot shows accuracy of the gantry angle was less than 0.5 degree. \nConclusion: The isocentricity of the compact super-conducting rotating gantry for carbon ion therapy dedicated to the highly precise treatment were within 1mm. Two of digital measurement system brought high-efficient beam adjusting and commissioning. |
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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 | 59th AnnualMeeting of American association of Physicists in Medicine (AAPM2017) | |||||
| 発表年月日 | ||||||
| 日付 | 2017-07-30 | |||||
| 日付タイプ | Issued | |||||
