WEKO3
アイテム
GATE Optical Simulation of a Dual-Ended Readout DOI PET Detector with Trapezoid Geometry
https://repo.qst.go.jp/records/77151
https://repo.qst.go.jp/records/77151383380cf-dac2-4b00-95cb-563335dcd822
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-10-16 | |||||
| タイトル | ||||||
| タイトル | GATE Optical Simulation of a Dual-Ended Readout DOI PET Detector with Trapezoid Geometry | |||||
| 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× Tashima, Hideaki× Nishikido, Fumihiko× Yamaya, Taiga× Kang, Hangyu× Tashima, Hideaki× Nishikido, Fumihiko× Yamaya, Taiga |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | GATE Monte Carlo optical simulation has been used widely as an excellent tool for the design and optimization of positron emission tomography (PET) detectors. Recently, our group has started to develop a small animal depth-of-interaction (DOI) PET scanner with a trapezoid geometry crystal for high-resolution and high-sensitivity small animal imaging. However, modeling of a DOI PET detector with a trapezoid geometry crystal has not been studied yet because of the complex geometry. The aim of this study was to model this trapezoid geometry detector with a mixed SiPM pitch using GATE Monte Carlo optical simulation. The trapezoid geometry dual-ended readout PET detector consisted of a 13 × 11 LYSO crystal array, two room temperature vulcanized (RTV) rubber light guides (thickness = 1 mm), a 7×6 SiPM array (pixel pitch = 2.4 mm) and a 8×4 SiPM array (pixel pitch = 3.2 mm). The 20 mm long LYSO crystal had front and back pitches of 1.18 mm and 1.87 mm, respectively. We took into account the emission spectrum of the LYSO crystal and the photon detection efficiency of the SiPM for the optical simulation. The effect of the crystal surface roughness on the DOI resolution was investigated. The DOI resolution was calculated by using the signal amplitude ratio of the two SiPMs. We analyzed the GATE optical simulation output file by using a custom-written MATLAB code to generate a 2D flood map and DOI histogram. In conclusion, we could identify all crystals in the 13×11 LYSO crystal array in the 2D flood map. The DOI resolution of 1.1 mm could be obtained by using a saw-cut LYSO crystal. In the future, we plan to validate the GATE optical simulation results by experimental results. | |||||
| 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 | 2019 IEEE Nuclear Science Symposium and Medical Imaging Conference | |||||
| 発表年月日 | ||||||
| 日付 | 2019-10-31 | |||||
| 日付タイプ | Issued | |||||
