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Inter-crystal scatter identification for a depth-sensitive detector using support vector machine for small animal PET
https://repo.qst.go.jp/records/68625
https://repo.qst.go.jp/records/68625909511d7-fcbe-4298-94ee-8e0464fc1ceb
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2006-08-18 | |||||
| タイトル | ||||||
| タイトル | Inter-crystal scatter identification for a depth-sensitive detector using support vector machine for small animal PET | |||||
| 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 a conventional PET detector, detected events are projected to 2D position histogram with Anger calculation for a crystal identification. However, the measured histogram is affected by inter-crystal scatterings (ICS) which occur in a whole detector. Peaks with projected each crystal in the histogram are blurred, and it causes ICS's mispositioning. A depth of interaction (DOI) detector has been developed for the small animal PET scanner: jPET-RD. This DOI detector uses 32 x 32 crystals with four layers and a 256-channel multi-anode flat panel photomultiplier tube (FP-PMT) was developed by Hamamatsu Photonics K.K. Each crystal element is 1.45 x 1.45 x 4.5 mm3. The FP-PMT has a large detective area (49 x 49 mm2) and small anode pitch (3.04 mm). Therefore, the FP-PMT can extensively trace the behavior of incident gamma rays in the crystals including ICS. We therefore propose a novel method for ICS estimation using a statistical pattern recognition based on the support vector machine (SVM). In this study, we applied the SVM for discriminating photoelectric events from ICS events generated from multiple-anode outputs. The SVM was trained by uniform irradiation events generated from a detector simulator using Monte Carlo calculation. Initial result of ICS identification is about 78 % for non-training data. This method can archive a true subtraction of ICS from measured events, and it is also useful for random correction in PET. | |||||
| 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 | 1st European Conference on Molecular Imaging Technology | |||||
| 発表年月日 | ||||||
| 日付 | 2006-05-12 | |||||
| 日付タイプ | Issued | |||||
