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

Frances W.Y. Lau; Arne Vandenbroucke; Jung Yeol Yeom; Paul D. Reynolds; David Hsu; Derek Innes; Craig S. Levin

doi:10.1109/TNS.2015.2440437

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

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

School of Biomedical Engineering

Research output: Contribution to journal › Article › peer-review

4 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 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.

Original language	English
Article number	7147842
Pages (from-to)	1989-1994
Number of pages	6
Journal	IEEE Transactions on Nuclear Science
Volume	62
Issue number	5
DOIs	https://doi.org/10.1109/TNS.2015.2440437
Publication status	Published - 2015 Oct 1

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

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title = "Programmable High Voltage Distribution for Photodetectors in a 1 mm Resolution Clinical PET System",

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.",

keywords = "Avalanche photodiode, high-voltage techniques, photodetectors, positron emission tomography (PET)",

author = "Lau, {Frances W.Y.} and Arne Vandenbroucke and Yeom, {Jung Yeol} and Reynolds, {Paul D.} and David Hsu and Derek Innes and Levin, {Craig S.}",

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AU - Vandenbroucke, Arne

AU - Yeom, Jung Yeol

AU - Reynolds, Paul D.

AU - Hsu, David

AU - Innes, Derek

AU - Levin, Craig S.

PY - 2015/10/1

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AB - 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.

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KW - high-voltage techniques

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

Abstract

Keywords

ASJC Scopus subject areas

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