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Four-layered DOI-PET detector with quadrisected top layer crystals
https://repo.qst.go.jp/records/75771
https://repo.qst.go.jp/records/757713d439578-9f54-4aea-82f4-0f3b98f450b7
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-05-09 | |||||
| タイトル | ||||||
| タイトル | Four-layered DOI-PET detector with quadrisected top layer crystals | |||||
| 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 |
吉田, 英治
× 吉田, 英治× 蛭海, 元貴× 田島, 英朗× 田久, 創大× 錦戸, 文彦× 山谷, 泰賀× Yoshida, Eiji× Hirumi, Genki× Tashima, Hideaki× Takyu, Sodai× Nishikido, Fumihiko× Yamaya, Taiga |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Previously, we had developed a four-layered depth-of-interaction (DOI) PET detector based on the light sharing method. Reflectors, which were inserted in every two lines of crystal segments and shifted differently for each layer, projected 3D crystal positions onto a 2D position histogram without any overlapping after applying the Anger-type calculation. The best crystal separation we ever obtained was for the four-layered 32×32 array of LYSO crystals sized at 1.45×1.45×5mm3. However, assembling small crystals tended to cost a lot, and fine tuning of the front-end circuit was required to get fine crystal identification. In this paper, therefore, we proposed a more practical four-layered DOI detector. Its key concept was that the crystals in the top layer, which have the highest detection efficiency, are the biggest contributors to the PET spatial resolution. We applied two new ideas: (1) using quarter size crystals only for the first (top) layerand (2) inserting a thin light guide between the first and the second layers of the crystal array. In the developed prototype detector, we used 24×24 LYSO crystals of quarter size (1.4×1.4×5.0mm3) in the first layer and the other layers were 12×12 arrays of crystals of 2.8×2.8×5.0mm3. For better crystal identification of small crystals in the first layer, we optimized the optical condition between crystals by using an optical adhesive and air. Also, the thin light guide of 0.5mm thickness was inserted between the first and the second layers for improvement of crystal identification of the first layer. With the appropriate insertion of the light guide, all crystals of the first layer were identified as well as the crystals in the other layers. Our developed four-layered DOI detector showed good potential for high spatial resolution without a large increase in the number of crystals. | |||||
| 書誌情報 |
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 巻 933, p. 1-7, 発行日 2019-04 |
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| 出版者 | ||||||
| 出版者 | Elsevier | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0168-9002 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1016/j.nima.2019.04.023 | |||||
| 関連サイト | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1016/j.nima.2019.04.023 | |||||
