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Intrinsic performance evaluation of a new TOF-PET detector module with 256-ch 3-mm-pitch MPPC array
https://repo.qst.go.jp/records/66774
https://repo.qst.go.jp/records/66774cb7ffcd4-ca99-4cc0-bca7-ec63daaaedac
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-04-16 | |||||
| タイトル | ||||||
| タイトル | Intrinsic performance evaluation of a new TOF-PET detector module with 256-ch 3-mm-pitch MPPC array | |||||
| 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 |
赤松, 剛
× 赤松, 剛× 田久, 創大× 吉田, 英治× 新田, 宗孝× 岩男, 悠真× Ｍｏｈａｍｍａｄｉ, Ａｋｒａｍ× 田島, 英朗× 山谷, 泰賀× 赤松 剛× 田久 創大× 吉田 英治× 新田 宗孝× 岩男 悠真× Ｍｏｈａｍｍａｄｉ Ａｋｒａｍ× 田島 英朗× 山谷 泰賀 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Intrinsic performance evaluation of a new TOF-PET detector module with 256-ch 3-mm-pitch MPPC array \n256チャンネルMPPCを搭載した新しいTOF-PET検出器モジュールの基本性能の評価 \nGo Akamatsu1, Sodai Takyu1, Eiji Yoshida1, Munetaka Nitta1, Yuma Iwao1, Akram Mohammadi1, Hideaki Tashima1, Taiga Yamaya1 \n1)National Institute of Radiological Sciences, National Institutes for Quantum and Radiological Science and Technology \n【Purpose】 A new PET detector module which consists of a 3-mm-pitch 16×16 LFS scintillator array and a 16×16 (256-ch) multi-pixel photon counter (MPPC) array has been developed for TOF-PET systems. The module has four ASIC boards which enable processing a large number of signals. In this study, we evaluated intrinsic performance of the module and compared count rate characteristics with another PET detector module equipped with two ASIC boards and 12×12 (144-ch) 4-mm-pitch MPPC array. \n【Methods】 A pair of the 256-ch PET detector modules were oppositely placed and were irradiated from 22Na point source located on center between modules. We measured energy resolution after linearity saturation correction and measured coincidence resolving time (CRT). The energy window of each channel was set to ±2sigma. In addition, we investigated count rate characteristics of two types of the modules which are 256-ch and 144-ch detector modules by changing distance between modules. The crystal length is 10-mm for both modules. A 22Na point source and a micro sphere (125 µL) filled with 18F-solution were used to evaluate count rate dependency of the CRT performance. \n【Results】 The mean energy resolution at 511 keV was 11.8±0.8% for one module and 12.2±0.7% for another module. The CRT of all channels was 235.1 ps. The 256-ch detector module detected more radiations by about 10% compared with the 144-ch detector module and worked normally in case of high count rate condition of 1,000 kcps per module (allowable performance limit) without a considerable loss of the CRT performance. \n【Conclusion】 We confirmed high intrinsic performance of the new 256-ch TOF-PET detector module. Furthermore, the module showed high stability against high count rate condition. These characteristics are suitable for compact brain PET systems in consideration of a small distance between a subject and a detector. |
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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 | JRC2018（第115回日本医学物理学会学術大会） | |||||
| 発表年月日 | ||||||
| 日付 | 2018-04-15 | |||||
| 日付タイプ | Issued | |||||
