A modular hybrid PSPMT/SiPM depth encoding detector for high resolution positron emission tomography

M. G Buddika Sumanasena, Felipe Godinez, Martin S. Judenhofer, Qiyu Peng, Ramsey D Badawi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

PERFORMANCE of positron emission tomography (PET) scanners can be improved by using detectors that can measure depth of interaction (DOI) [1]. Dual ended readout is one of the widely studied methods to measure DOI. In this design two photodetectors are coupled to either end of a crystal or a block of crystals and DOI is estimated using the ratio of signal amplitudes recorded by the two photodetectors [2][3][4][5][6]. A hybrid dual ended readout DOI detector that uses a position sensitive photomultiplier tube (PSPMT) and an Avalanche photo diode (APD) for photodetection was presented in [2]. This prototype was further developed into a modular detector that encapsulates the electronic and mechanical functionality of a gamma detector to a compact self contained unit [7]. The modular detector can be easily integrated into new scanner designs with no changes to the detector itself. This facilitates rapid and cost effective development of application specific PET scanners. Such modules may also be rapidly transferred from one scanner gantry to another. The APD used in [7] requires a bias voltage of over 1800 V. The signal produced by APD is orders of magnitude smaller compared to PSPMT signal and requires extremely high amplification. Moreover, APD signal has to be routed near the body of the PSPMT. Therefore, shielding is required to reduce the interference from PSPMT. To address these shortcoming a modular detector was designed using SiPMs instead of APDs. SiPMs used in this detector requires bias voltages in the range 26V-29.5V and requires simpler amplifier circuitry due to the stronger signals produced.

Original languageEnglish (US)
Title of host publication2015 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2015
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781467398626
DOIs
StatePublished - Oct 3 2016
Event2015 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2015 - San Diego, United States
Duration: Oct 31 2015Nov 7 2015

Other

Other2015 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2015
CountryUnited States
CitySan Diego
Period10/31/1511/7/15

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Radiology Nuclear Medicine and imaging
  • Instrumentation

Fingerprint Dive into the research topics of 'A modular hybrid PSPMT/SiPM depth encoding detector for high resolution positron emission tomography'. Together they form a unique fingerprint.

  • Cite this

    Sumanasena, M. G. B., Godinez, F., Judenhofer, M. S., Peng, Q., & Badawi, R. D. (2016). A modular hybrid PSPMT/SiPM depth encoding detector for high resolution positron emission tomography. In 2015 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2015 [7582152] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/NSSMIC.2015.7582152