Digital silicon photomultiplier readout of a new fast and bright scintillation crystal (Ce:GFAG)

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• 作者：Yong-Seok Lee^a ; Hyun-Tae Leem^b ; Seiichi Yamamoto^c ; Yong Choi^b ; ^{ychoi@sogang.ac.kr" class="auth_mail" title="E-mail the corresponding author} ; Kei Kamada^d ; ^e ; Akira Yoshikawa^d ; ^e ; ^f ; Sang-Geon Park^g ; Jung-Yeol Yeom^a ; ^h ; ^{jungyeol@korea.ac.kr" class="auth_mail" title="E-mail the corresponding author}
• 关键词：GFAG ; Gamma-ray spectroscopy ; PET ; SPECT ; Scintillators ; Digital silicon photomultipliers
• 刊名：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
• 出版年：2016
• 出版时间：1 October 2016
• 年：2016
• 卷：832
• 期：Complete
• 页码：63-67
• 全文大小：1326 K

文摘

A new Gadolinium Fine Aluminum Gallate (Ce:GFAG) scintillation crystal with both high energy resolution and fast timing properties has successfully been grown. Compared to Gd₃Al₂Ga₃O₁₂ (Ce:GAGG), this new inorganic scintillation crystal has a high luminosity similar to and a faster decay time. In this paper, we report on the timing and energy performance results of the new GFAG scintillation crystal read out with digital silicon photomultipliers (dSiPM) for positron emission tomography (PET) application. The best coincidence resolving time (FWHM) of polished 3×3×5 mm³ crystals was 223±6 ps for GFAG crystals compared to 396±28 ps for GAGG crystals and 131±3 ps for LYSO crystals respectively. An energy resolution (511 keV peak of Na-22) of 10.9±0.2% was attained with GFAG coupled to dSiPM after correcting for saturation effect, compared to 9.5±0.3% for Ce:GAGG crystals and 11.9±0.4% for LYSO crystals respectively. It is expected that this new scintillator may be competitive in terms of overall properties such as energy resolution, timing resolution and growing (raw material) cost, compared to existing scintillators for positron emission tomography (PET).