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Initial results of trapezoid geometry small animal DOI PET detector using SSLE
https://repo.qst.go.jp/records/78111
https://repo.qst.go.jp/records/78111ddf3a948-800b-4b2c-a8c1-bf8ade8d74af
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-12-19 | |||||
| タイトル | ||||||
| タイトル | Initial results of trapezoid geometry small animal DOI PET detector using SSLE | |||||
| 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 |
Kang, Hangyu
× Kang, Hangyu× Nishikido, Fumihiko× Yoshida, Eiji× Sakai, Toshiaki× Yamaya, Taiga× Kang, Hangyu× Nishikido, Fumihiko× Yoshida, Eiji× Yamaya, Taiga |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | [Purpose] Small animal positron emission tomography (PET) has been playing an important role in preclinical research. However, a conventional PET scanner has a large gap between the detector blocks due to the box shape crystal geometry which resulted in a sensitivity loss. The aim of this study is to develop a trapezoid crystal based small animal PET detector using subsurface laser engraving (SSLE) technique for high sensitivity and high resolution PET scanner research. [Methods] The proposed trapezoidal geometry small animal DOI PET detector consists of a three trapezoid LYSO plates, and multi-pixel photon counters (MPPCs). The 0.9 mm thick LYSO plates were pixelized by SSLE in X-direction with pixel pitches of 1.02 mm and 1.707 mm at the top and bottom surfaces, respectively. The LYSO in DOI direction was remained as continuous without SSLE processing. The SSLE processed LYSO plates were optically isolated each other by ESR reflector direction. The scintillation light from the top and bottom surfaces of trapezoid LYSO crystal was readout by a 7×6 array MPPC (Pitch=2.4 mm), and an 8×4 array MPPC (Pitch=3.2 mm), respectively. In order to evaluate the DOI resolution, a collimated 511 keV photon was irradiated to the LYSO crystal (lead slit width=1.2 mm) for different DOI positions (2, 6, 10, 14, and, 18 mm). The DOI resolution was calculated by using the signal amplitude ratio of the two MPPCs. [Results] All the 15×3 LYSO crystals could be resolved clearly. The energy resolution and DOI resolution were measured to be less than 25% and 3.5 mm, respectively. The DOI ratio showed non-linear characteristics due to the trapezoid crystal geometry. [Conclusion] In conclusion, we demonstrated the feasibility of a trapezoid geometry small animal DOI PET detector using SSLE technique. In the future, a prototype trapezoid geometry small animal PET scanner will be developed. |
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| 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 | 第117回日本医学物理学会学術大会 | |||||
| 発表年月日 | ||||||
| 日付 | 2019-04-11 | |||||
| 日付タイプ | Issued | |||||
