Speaker
Qingyang Wei
(Tsinghua University)
Description
Silicon Photomultiplier (SiPM) is a promising sensor for PET detector which is able to work normally in the MR environment. In this paper, we developed a compact DOI-PET detector based on an 8x8 SiPM (MicroFB-30035-SMT) array and two layers of LYSO arrays. A 15x15 top layer placed half crystal offset on a 16x16 bottom layer and then coupled to the SiPM array. Size of the LYSO crystals in both layers is 2x2x7mm3. Sixty-four channels of SiPMs are multiplexed by an ASIC chip with in-chip resistor networks into 3 analog outputs and then fully digitized by 3 ADC chips. The energy is calculated by averaging the 3 points around the peak of the pulse. Experiments with two 22Na point sources were studied. The results show that the detector module achieves good crystal identification capability and energy resolution in both layers.
Primary author
Qingyang Wei
(Tsinghua University)
