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Timing resolution of TlBr and TlBr-TlCl PET detectors based on Cerenkov radiation measurement

https://repo.qst.go.jp/records/83571
https://repo.qst.go.jp/records/83571
e037d41f-5804-4a84-9842-ace328a0cc8e
Item type 会議発表用資料 / Presentation(1)
公開日 2021-10-07
タイトル
タイトル Timing resolution of TlBr and TlBr-TlCl PET detectors based on Cerenkov radiation measurement
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 Fumihiko, Nishikido

× Fumihiko, Nishikido

WEKO 1006933

Fumihiko, Nishikido

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Hitomi, Keitaro

× Hitomi, Keitaro

WEKO 1006934

Hitomi, Keitaro

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Nogami, Satoshi

× Nogami, Satoshi

WEKO 1006935

Nogami, Satoshi

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Kang, Hangyu

× Kang, Hangyu

WEKO 1006936

Kang, Hangyu

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Taiga, Yamaya

× Taiga, Yamaya

WEKO 1006937

Taiga, Yamaya

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Fumihiko, Nishikido

× Fumihiko, Nishikido

WEKO 1006938

en Fumihiko, Nishikido

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Kang, Hangyu

× Kang, Hangyu

WEKO 1006939

en Kang, Hangyu

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Taiga, Yamaya

× Taiga, Yamaya

WEKO 1006940

en Taiga, Yamaya

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抄録
内容記述タイプ Abstract
内容記述 TlBr is a high density (7.56 g/cm) semiconductor material composed of high effective atomic number elements. Therefore, TlBr has sufficient detection efficiency for 511 keV annihilation radiation in PET. In addition, TlBr detectors have high energy resolution due to the direct conversion to electrons. On the other hand, timing performance of typical semiconductor detectors is poor compared with scintillation detectors However, detection of Cerenkov light from TlBr offers an alternative method to get better timing resolution. This paper reports our feasibility study on the timing performance of TlBr detectors using Cerenkov light.
In the experiment, a conventional TlBr crystal and TlBr mixed with TlCl (TlBr-TlCl crystal) were used. The TlBr crystals were fabricated at Tohoku University. Each TlBr crystal was 3 × 3 × 3 mm3. The TlBr crystals were covered with ESR films and Teflon tape. Cerenkov light was detected with a multi-pixel photon counter (Hamamatsu S13360-3075CS). Coincidence detection measurement was carried out using a LYSO scintillator coupled with another MPPC (Hamamatsu S13360-3050CS) as a reference detector. Signals from the detectors were amplified with high frequency amplifiers and then waveforms were recorded with a digitizer (CAEN, DT5742).
We obtained the timing spectra by Cerenkov light from the TlBr and scintillation light from the LYSO. From them, the timing resolution better than 600 ps was obtained for all the event data. After selecting the events by optimizing a trigger level, the timing resolutions better than 450 ps was obtained for both the TlBr detector and the TlBr-TlCl 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
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