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Initial Results for a Small Animal DOI PET Detector with Sub-Surface Laser Engraving Based Trapezoid Geometry
https://repo.qst.go.jp/records/77145
https://repo.qst.go.jp/records/77145ab295be5-bafa-4b69-9660-0fdb62a096b9
| 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 | Initial Results for a Small Animal DOI PET Detector with Sub-Surface Laser Engraving Based 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× Nishikido, Fumihiko× Tashima, Hideaki× Sakai, Toshiaki× Yamaya, Taiga× Kang, Hangyu× Nishikido, Fumihiko× Tashima, Hideaki× Yamaya, Taiga |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | A small animal depth-of-interaction (DOI) positron emission tomography (PET) detector based on a trapezoid shaped crystal was originally proposed by Simon Cherry’s group at UC Davis as a way to minimize the gaps between detector blocks. However, manufacturing the trapezoid shaped crystal is costly due to the complex geometry. As a more practical idea, here we developed a small animal DOI PET detector using a sub-surface laser engraving (SSLE) based trapezoid geometry. The imaging performance of the proposed PET scanner was presented in the most recent GATE User’s workshop. In the developed detector, we pixelized a 20 mm long monolithic trapezoid LYSO plate (top = 15.3 mm, bottom = 25.6 mm, thickness = 0.9 mm) into a 15 × 1 array by using SSLE to yield a top crystal pitch of 1.02 mm and a bottom crystal pitch of 1.71 mm. The 11 SSLE processed LYSO crystal plates were assembled together to make a 15 × 11 array. The LYSO plates were optically isolated by using as enhanced specular reflector (ESR). A 7×6 array SiPM (S13360-2050VE, Hamamatsu Photonics, Japan) with a pixel pitch of 2.4 mm and an 8×4 array SiPM (S13361-3050NE-04 Hamamatsu Photonics) with a pixel pitch of 3.2 mm were coupled to the top and bottom surfaces of the trapezoid LYSO array, respectively. For an optical coupling, room temperature vulcanized (RTV) light guides with a thickness of 1 mm were inserted between the LYSO and SiPM array. The SiPM output signals were multiplexed by using a resistive network, and then digitized by CAMAC DAQ. We could identify all the crystals in the 2D flood map. The measured DOI resolution and energy resolution were 2.3±0.6 mm and 11.6±0.7%, respectively. In the future, we want to develop a prototype trapezoid geometry small animal DOI PET scanner for high-resolution and high-sensitivity mouse brain imaging. | |||||
| 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 | 2019-10-30 | |||||
| 日付タイプ | Issued | |||||
