WEKO3
アイテム
Development and performance evaluation of a single-ring OpenPET prototype
https://repo.qst.go.jp/records/70982
https://repo.qst.go.jp/records/70982cdf5b640-e4b6-4a54-abd3-ffe12a4a1bdb
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2012-11-16 | |||||
| タイトル | ||||||
| タイトル | Development and performance evaluation of a single-ring OpenPET prototype | |||||
| 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 |
Yoshida, Eiji
× Yoshida, Eiji× Kinouchi, Shoko× Tashima, Hideaki× Nishikido, Fumihiko× Hirano, Yoshiyuki× Inadama, Naoko× Murayama, Hideo× Ito, Hiroshi× Yamaya, Taiga× 吉田 英治× 木内 尚子× 田島 英朗× 錦戸 文彦× 平野 祥之× 稲玉 直子× 村山 秀雄× 伊藤 浩× 山谷 泰賀 |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | One of the challenging applications of PET is implementing it for in-beam PET, which is an in situ monitoring method for charged particle therapy. For this purpose, we have previously proposed an open-type PET scanner, OpenPET. The original OpenPET had a physically opened field of view (FOV) between two detector rings through which irradiation beams pass. This dual-ring OpenPET (DROP) had a wide axial FOV including the gap. This geometry was not necessarily the most efficient for application to in-beam PET in which only a limited FOV around the irradiation field is required. Therefore, we have proposed a new single-ring OpenPET (SROP) geometry which can provide an accessible and observable open space with higher sensitivity and a reduced number of detectors than the DROP. The proposed geometry was a cylinder shape with its ends cut at a slant, in which the shape of each cut end became an ellipse. In this work, we developed and evaluated a small prototype of the SROP geometry for proof-of-concept. The SROP prototype was designed with 2 ellipse-shaped detector rings of 16 DOI detectors. The DOI detectors consisted of 1024 GSOZ crystals which were arranged in 4 layers of 16 X 16 arrays, coupled to a 64-ch FP-PMT. Each ellipse-shaped detector ring had a major axis of 281.6 mm and a minor axis of 207.5 mm. For the open mode, the rings were placed at a 45-deg slant from the axial direction and for the non-open mode (used as a reference) they were at 90 deg from the axial direction with no gap. The system sensitivity and average spatial resolution were measured from a 22Na point source and were 5.0 % and 2.7 mm, respectively, for the open mode. Comparison between the open mode and the non-open mode showed no remarkable difference in terms of the sensitivity distribution and spatial resolution performance. Therefore, we concluded that the SROP geometry has a good potential as an open geometry especially suitable for in-beam imaging. | |||||
| 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 | 2012IEEE NSS&MIC | |||||
| 発表年月日 | ||||||
| 日付 | 2012-11-03 | |||||
| 日付タイプ | Issued | |||||
