Development of a prototype of time-over-threshold based small animal PET scanner

作者：Shimazoe K^*; Takahashi H; Kamada K; Yoshikawa A; Kumagai K; Kataoka J; Itoh S; Sato H; Usuki Y

来源：Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment , 2014, 753: 84-90.

DOI：10.1016/j.nima.2014.03.008

• Time over threshold
• Avalanche photodiode
• Positron emission tomography

A time-over-threshold (ToT)-based positron emission tomography (TODPET) scanner was designed and fabricated. The PET scanner consisted of eight block detectors, each of which is composed of a 12 x 12 array of 2 x 2 x 10 mm(3) Pr:LuAG crystals individually coupled with a 12 x 12 UV-enhanced avalanche photodiode (APD) array. The APDs were individually read out using a custom-designed time-over-threshold application-specific integrated circuit (ASIC) and field-programmable gate array (FPGA) readout system. The PET scanner has an energy resolution of 10% and a time resolution of 4.2 no, A spatial resolution of 1.17 mm (FWHM) was demonstrated in the initial results.

• 出版日期2014-7-21