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Inter-crystal scatter identification for a depth-sensitive detector using multi-anode outputs
https://repo.qst.go.jp/records/68750
https://repo.qst.go.jp/records/687501884fcd7-4e15-44f6-99ea-c3740c86e02d
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2006-11-07 | |||||
| タイトル | ||||||
| タイトル | Inter-crystal scatter identification for a depth-sensitive detector using multi-anode outputs | |||||
| 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× Kitamura, Keishi× Kimura, Yuichi× Nishikido, Fumihiko× Shibuya, Kengo× Yamaya, Taiga× Murayama, Hideo× 吉田 英治× 北村 圭司× 木村 裕一× 錦戸 文彦× 澁谷 憲悟× 山谷 泰賀× 村山 秀雄 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In conventional PET detectors, detected events are projected to a 2D position histogram using the Anger calculation for crystal identification. Inter-crystal scatter (ICS) events causes mispositioned crystals because peaks with projected each crystal in the histogram are blurred. A depth of interaction (DOI) detector has been developed for the small animal PET scanner: jPET-RD. This DOI detector uses four-layered arrays of 32 x 32 crystals and a 256-channel multi-anode flat panel photomultiplier tube (FP-PMT). Each crystal element is 1.45 mm x 1.45 mm x 4.5 mm. The FP-PMT has a large detective area and small anode pitch. We think that the FP-PMT has a potential for the trace of the scattered gamma rays in the crystals. In this study, we therefore propose a novel method for ICS estimation using the principle component analysis (PCA). The PCA is applied to multiple-anode outputs in order to discriminate photoelectric events from ICS events. The 1st principle component depends on number of anode outputs deposited energy through the preprocessing. Numerical simulation results shows that the rate of the ICS identification by the proposed method is about 77.6 % at a 511 keV uniform irradiation. Also, PCA method can be identified only events which have large effect on spatial resolution in the ICS events. The proposed method can archive a true subtraction of ICS from measured events. | |||||
| 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 | IEEE 2006 Nuclear Science Symposium, Medical Imaging Conference | |||||
| 発表年月日 | ||||||
| 日付 | 2006-11-04 | |||||
| 日付タイプ | Issued | |||||
