Programmable High Voltage Distribution for Photodetectors in a 1 mm Resolution Clinical PET System
- Authors
- Lau, Frances W. Y.; Vandenbroucke, Arne; Yeom, Jung-Yeol; Reynolds, Paul D.; Hsu, David; Innes, Derek; Levin, Craig S.
- Issue Date
- 10월-2015
- Publisher
- IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
- Keywords
- Avalanche photodiode; high-voltage techniques; photodetectors; positron emission tomography (PET)
- Citation
- IEEE TRANSACTIONS ON NUCLEAR SCIENCE, v.62, no.5, pp.1989 - 1994
- Indexed
- SCIE
SCOPUS
- Journal Title
- IEEE TRANSACTIONS ON NUCLEAR SCIENCE
- Volume
- 62
- Number
- 5
- Start Page
- 1989
- End Page
- 1994
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/92281
- DOI
- 10.1109/TNS.2015.2440437
- ISSN
- 0018-9499
- Abstract
- We present a scalable, cost-effective, and compact high voltage (HV) distribution design for a system that requires many HV channels for photodetector biasing. A digital-to-analog converter (DAC) with a 100 V output range is floated with its reference at -1800 V, providing outputs between -1800 V and -1700 V. As a consequence, the DAC control and power signals are referenced to V. This design was implemented in our 1 mm resolution clinical PET imaging system with detectors comprised of LYSO scintillation crystals coupled to position-sensitive avalanche photodiodes (PSAPDs). The programmable bias voltage outputs have only 20 m V-pp of bias ripple. This design enables all PSAPDs to be biased at their optimal bias voltage, allowing us to achieve a standard deviation of only 2.3% in the energy resolution measured across all 512 PSAPDs in the subsystem.
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Collections - Graduate School > Department of Bioengineering > 1. Journal Articles
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