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- W1020739575 abstract "355 Objectives Solid-state photomultiplier (SSPM) is a high-performing Geiger-mode avalanche photodiode, which is suitable for the MR-compatible PET detector. In this presentation, we will report our progresses on the development of the SSPM PET system, focusing on the LGSO-SSPM block detector construction and SSPM bias voltage supply. Methods About 140 SSPMs were tested to find optimal bias and relationship between output gain and its bias voltage. The SSPM-PET system consists of 10 blocks, each of which is comprised of 2x6 SSPMs, a quartz layer and 4x13 LGSO (1.5x1.5x7 mm3) crystals. Preamplifier boards that amplify output signals and individually supply adjustable bias voltage to each SSPM, and position encoding boards for SSPM array were developed. The digitally controlled voltage supply with temperature sensors enables fine control of each SSPM bias voltage. Results The SSPMs were found to have a large range of optimal bias and sensitive variation in gains with bias change (~60 pC/0.1V). All detector blocks with the front-end electronics were constructed. Each crystal was clearly visible in flood images. The digitally controlled voltage supply, which coupled with each detector block, showed finely controllable resolution from 0.01 to 0.1V, very low ripple ( Conclusions The SSPM-based block detector required fine adjustment of bias voltage with temperature control, which would be possible with the digitally controlled voltage supply. The full ring SSPM PET system for small animal PET/MR imaging is under construction based on this progress." @default.
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- W1020739575 date "2009-05-01" @default.
- W1020739575 modified "2023-09-23" @default.
- W1020739575 title "Development of SSPM-PET with digitally controlled bias voltage supply" @default.
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