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Optimization of GFAG Crystal Surface Treatment for SiPM Based Clinical TOF PET Detector
https://repo.qst.go.jp/records/83621
https://repo.qst.go.jp/records/83621833454fe-16c7-481f-8dfc-0233cac4797c
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2021-10-15 | |||||
| タイトル | ||||||
| タイトル | Optimization of GFAG Crystal Surface Treatment for SiPM Based Clinical TOF PET Detector | |||||
| 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× Kang, Hangyu |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Coincidence timing resolution (CTR) is one of the important parameters in state-of-the-art clinical positron emission tomography (PET) scanners to increase the signal-to-noise ratio of reconstructed PET images by using time-of-flight (TOF) information. The aim of this study was to enhance the CTR and energy resolution of a silicon photomultiplier (SiPM) based clinical TOF-PET detector by optimizing the crystal surface treatment used for a 20 mm long crystal geometry. The TOF-PET detector consisted of a cerium doped gadolinium fine aluminum gallate (Ce:GFAG) scintillation crystal (3.0 × 3.0 × 20 mm3, C&A, Japan) and an SiPM (Hamamatsu, S13360-3050CS, Japan) with an effective area of 3.0 × 3.0 mm2. s with Eight different types of GFAG crystal surface treatment: mechanical polishing (M.P) of all surfaces and seven different partial saw-cuts (i.e. top, ⅟₂-side lower, ½-side upper, 1-side, 2-side, 3-side, and 4-side) were used to find the optimal treatment. The timing and energy signals were extracted by using a high-frequency SiPM readout circuit and then were digitized by using a CAMAC DAQ system. The 1-side saw-cut resulted in a 14 ps better CTR (203±3 ps) and 1.9% better energy resolution (9.3%) over those of the M.P crystal (CTR=217±4 ps, energy resolution=11.2%). The ⅟₂-side saw-cut enhanced the CTR (203±3 ps), however the energy resolution (12.5%) was degraded due to the variation in light collection efficiency along the crystal depth. In conclusion, the 1-side saw-cut was the optimal crystal surface treatment in terms of CTR and energy resolution for the SiPM based TOF PET detector. | |||||
| 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 | 2021 Virtual IEEE Nuclear Science Symposium and Medical Imaging Conference | |||||
| 発表年月日 | ||||||
| 日付 | 2021-10-22 | |||||
| 日付タイプ | Issued | |||||
