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Suitability of a 280 ps-CRT non-DOI detector for the helmet-neck PET

https://repo.qst.go.jp/records/78118
https://repo.qst.go.jp/records/78118
12dadac6-22d1-4e12-9780-ab56ab53d873
Item type 会議発表論文 / Conference Paper(1)
公開日 2019-12-19
タイトル
タイトル Suitability of a 280 ps-CRT non-DOI detector for the helmet-neck PET
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_5794
資源タイプ conference paper
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 Takyu, Sodai

× Takyu, Sodai

WEKO 815346

Takyu, Sodai

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Ahmed, Abdella

× Ahmed, Abdella

WEKO 815347

Ahmed, Abdella

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Yoshida, Eiji

× Yoshida, Eiji

WEKO 815348

Yoshida, Eiji

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Tashima, Hideaki

× Tashima, Hideaki

WEKO 815349

Tashima, Hideaki

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Yamashita, Taichi

× Yamashita, Taichi

WEKO 815350

Yamashita, Taichi

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Yamaya, Taiga

× Yamaya, Taiga

WEKO 815351

Yamaya, Taiga

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Takyu, Sodai

× Takyu, Sodai

WEKO 815352

en Takyu, Sodai

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Ahmed, Abdella

× Ahmed, Abdella

WEKO 815353

en Ahmed, Abdella

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Yoshida, Eiji

× Yoshida, Eiji

WEKO 815354

en Yoshida, Eiji

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Tashima, Hideaki

× Tashima, Hideaki

WEKO 815355

en Tashima, Hideaki

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Yamashita, Taichi

× Yamashita, Taichi

WEKO 815356

en Yamashita, Taichi

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Yamaya, Taiga

× Yamaya, Taiga

WEKO 815357

en Yamaya, Taiga

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抄録
内容記述タイプ Abstract
内容記述 We are developing a compact and high-sensitivity brain-dedicated PET scanner, which consists of a hemispherically arranged detector unit and an add-on detector unit. Following our first idea of using a chin position as the location of the add-on detector (helmet-chin PET), a neck position has been selected as the location (helmet-neck PET). We have developed prototypes of both geometries using the 4-layered depth-ofinteraction (DOI) detector (2.8 mm sized GSOZ scintillators and a 64 ch PMT) which does not have time-of-flight (TOF) capability. On the other hand, a new TOF-PET detector module which consists of 4.1 mm sized LFS scintillators and multi pixel photon counters (MPPCs) is now commercially available (C135004075LC-12, Hamamatsu Photonics K.K.). Using one-to-one crystal-photodetector coupling, it is possible to achieve a 280 ps coincidence resolving time (CRT), although the Anger-type calculation, which is essential for the 4-layered DOI detector, cannot be applied. In this paper, therefore, we investigated the suitability of this TOF-PET detector module for the next helmetneck PET. At first, the helmet-neck PET with 20 mm crystal length, which is a standard parameter of the module, was modeled by GEANT4, and performance results were compared with those of the current helmet-neck PET prototype. We observed a compromised image quality; the non-DOI capability counteracted the TOF gain. On the other hand, the helmet-neck PET with shortened crystal length (10 mm) outperformed the current helmet-neck PET prototype; the shortened crystal length reduced the parallax error, and TOF information compensated for the loss of sensitivity. Based on the GEANT4 simulation results, we fabricated a one-pair prototype of the TOF-PET module with 10 mm length, which yielded 11.6 % energy resolution at 511 keV and 281.8\pm 9.6 ps CRT at FWHM. In conclusion, we confirmed suitability of the 280 ps-CRT non-DOI detector for the next helmet-neck PET.
書誌情報 Conference record of 2017 IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC)

発行日 2018-11
ISSN
収録物識別子タイプ ISSN
収録物識別子 2577-0829
ISBN
識別子タイプ ISBN
関連識別子 978-1-5386-2282-7
DOI
識別子タイプ DOI
関連識別子 10.1109/NSSMIC.2017.8532709
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