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Development of 3D measurement device dedicated for range-compensator QA
https://repo.qst.go.jp/records/65679
https://repo.qst.go.jp/records/65679a1e6fcab-2ba7-4082-b8e2-1816f91d7aa8
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2015-06-15 | |||||
| タイトル | ||||||
| タイトル | Development of 3D measurement device dedicated for range-compensator QA | |||||
| 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 |
Fukuda, Shigegazu
× Fukuda, Shigegazu× Shintani, Eriko× Yamada, Kiyohiro× 福田 茂一× 新谷 恵理子 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In carbon therapy, the broad-beam method is used to irradiate beams to the tumor conformally. The broaden beams are cut to the shape of the target tumor projected in the beam’s eye view by a patient collimator or multileaf collimator (MLC). To adjust the range of the beams to the target in the depth a range-compensator is used. The range-compensator is a block that has an engraved depression in the shape of the target tumor. [1] Though it is desirable to check the 3D shape of the range-compensator compared to the planned shape at all points, over 2000 points, in terms of QA/QC, only the limited points, 30-40 points, are usually checked by the contact length measurement sensor device (CLMSD). To verify all points automatically in a short time, the 3D measurement device (3DMD) dedicated for range-compensators QA has been developed.[Fig. 1] \nThe 3DMD has a XY-stage with high precision and a range-compensator is attached to the XY-stage. Two CCD laser displacement sensors were employed to measure the height of each point of the range-compensator by detecting reflected laser. We verified some range-compensators. \nDue to the shape there were some points which cannot be measured, but the ratio of the number of the unmeasured points to that of all points was less than 1%. The precision of the measurements by the 3DMD was within less than 0.1 mm, and the concave positions were verified as acceptable. It took less than 20 minutes to measure and verify the all points of the large patient compensator such as 20 cm x 20 cm x 12 cm. \nAfter further commissioning of the 3DMD, we plan to use this device to check the range-compensators routinely. \n[1] “Recent Innovations in Carbon-Ion Radiotherapy”, S. Minohara、S. Fukuda、and et.al., J. Radiat. Res., 51, 385–392 (2010) |
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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 | World congress on medical physics & biomedical engineering (WC2015) | |||||
| 発表年月日 | ||||||
| 日付 | 2015-06-11 | |||||
| 日付タイプ | Issued | |||||
