Programmable High Voltage Distribution for Photodetectors in a 1 mm Resolution Clinical PET System

Frances W.Y. Lau, Arne Vandenbroucke, Jungyeol Yeom, Paul D. Reynolds, David Hsu, Derek Innes, Craig S. Levin

Research output: Contribution to journalArticle

2 Citations (Scopus)

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 - 1800 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 Vpp 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.

Original languageEnglish
Article number7147842
Pages (from-to)1989-1994
Number of pages6
JournalIEEE Transactions on Nuclear Science
Volume62
Issue number5
DOIs
Publication statusPublished - 2015 Oct 1

Fingerprint

Avalanche photodiodes
Photodetectors
avalanches
photodiodes
digital to analog converters
photometers
high voltages
Digital to analog conversion
Bias voltage
output
Electric potential
Scintillation
electric potential
ripples
Imaging systems
scintillation
standard deviation
Detectors
costs
Crystals

Keywords

  • Avalanche photodiode
  • high-voltage techniques
  • photodetectors
  • positron emission tomography (PET)

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Nuclear Energy and Engineering
  • Electrical and Electronic Engineering

Cite this

Lau, F. W. Y., Vandenbroucke, A., Yeom, J., Reynolds, P. D., Hsu, D., Innes, D., & Levin, C. S. (2015). Programmable High Voltage Distribution for Photodetectors in a 1 mm Resolution Clinical PET System. IEEE Transactions on Nuclear Science, 62(5), 1989-1994. [7147842]. https://doi.org/10.1109/TNS.2015.2440437

Programmable High Voltage Distribution for Photodetectors in a 1 mm Resolution Clinical PET System. / Lau, Frances W.Y.; Vandenbroucke, Arne; Yeom, Jungyeol; Reynolds, Paul D.; Hsu, David; Innes, Derek; Levin, Craig S.

In: IEEE Transactions on Nuclear Science, Vol. 62, No. 5, 7147842, 01.10.2015, p. 1989-1994.

Research output: Contribution to journalArticle

Lau, FWY, Vandenbroucke, A, Yeom, J, Reynolds, PD, Hsu, D, Innes, D & Levin, CS 2015, 'Programmable High Voltage Distribution for Photodetectors in a 1 mm Resolution Clinical PET System', IEEE Transactions on Nuclear Science, vol. 62, no. 5, 7147842, pp. 1989-1994. https://doi.org/10.1109/TNS.2015.2440437
Lau, Frances W.Y. ; Vandenbroucke, Arne ; Yeom, Jungyeol ; Reynolds, Paul D. ; Hsu, David ; Innes, Derek ; Levin, Craig S. / Programmable High Voltage Distribution for Photodetectors in a 1 mm Resolution Clinical PET System. In: IEEE Transactions on Nuclear Science. 2015 ; Vol. 62, No. 5. pp. 1989-1994.
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