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Four-layer DOI PET detectors using a multi-pixel photon counter array and the light sharing method
https://repo.qst.go.jp/records/46920
https://repo.qst.go.jp/records/4692058c554fd-c5f8-48ef-b3e7-31860117e56b
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2014-11-10 | |||||
| タイトル | ||||||
| タイトル | Four-layer DOI PET detectors using a multi-pixel photon counter array and the light sharing method | |||||
| 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_6501 | |||||
| 資源タイプ | journal article | |||||
| 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 |
Nishikido, Fumihiko
× Nishikido, Fumihiko× Inadama, Naoko× Yoshida, Eiji× Murayama, Hideo× Yamaya, Taiga× 錦戸 文彦× 稲玉 直子× 吉田 英治× 村山 秀雄× 山谷 泰賀 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Silicon photomultipliers (SiPMs) provide many advantages for PET detectors, such as their high internal gain, high photon detection efficiency and insensitivity to magnetic fields. The number of detectable scintillation photons of SiPMs, however, is limited by the number of microcells. Therefore, pulse height of PET detectors using SiPMs is saturated when large numbers of scintillation photons enter the SiPM pixels. On the other hand, we previously presented a depth-of-interaction (DOI) encoding method that is based on the light sharing method. Since our encoding method detects scintillation photons with multiple readout pixels, the saturation effect can be suppressed. We constructed two prototype four-layer DOI detectors using a SiPM array and evaluated their performances. The two prototype detectors consisted of four layers of a 6 6 array of Lu 2(1 x) Y 2x SiO 5 (LYSO) crystals and a SiPM (multi-pixel photon detector, MPPC, Hamamatsu Photonics K.K.) array of 4 4 pixels. The size of each LYSO crystal element was 1.46 mm x 1.46 mm x 4.5 mm and all surfaces of the crystal elements were chemically etched. We used two types of MPPCs. The first one had 3600 microcells and high photon detection efficiency (PDE). The other one had 14,400 microcells and lower PDE. In the evaluation experiment, all the crystals of the detector using the MPPC which had the high PDE were clearly identified. The respective energy and timing resolutions of lower than 15% and 1.0 ns were achieved for each crystal element. No saturation of output signals was observed in the 511 keV energy region due to suppression of the saturation effect by detecting scintillation photons with several MPPC pixels by the light sharing method. |
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| 書誌情報 |
Nuclear Instruments & Methods in Physics Research Section A 巻 729, p. 755-761, 発行日 2013-10 |
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| 出版者 | ||||||
| 出版者 | Elsevier | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | http://www.sciencedirect.com/science/article/pii/S0168900213011571 | |||||
| 関連名称 | http://www.sciencedirect.com/science/article/pii/S0168900213011571 | |||||
