Mini Compton camera based on an array of Frisch-grid CdZnTe detectors

Wonho Lee, Aleksey Bolotnikov, Taewoong Lee, Giuseppe Camarda, Yonggang Cui, Rubi Gul, Anwar Hossain, Utpal Roy, Ge Yang, Ralph James

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

Abstract

We constructed a mini Compton camera based on an array of CdZnTe detectors and assessed its spectral and imaging properties. The entire array consisted of 6×6 Frisch-grid CdZnTe detectors, each with a size of 6×6×15 mm3. Since it is easier and more practical to grow small CdZnTe crystals rather than large monolithic ones, constructing a mosaic array of parallelepiped crystals can be an effective way to build a more efficient, large-volume detector. With the fully operational CdZnTe array, we measured the energy spectra for 133Ba-, 137Cs-, 60Co-radiation sources; we also located these sources using a Compton imaging approach. Although the Compton camera was small enough to hand-carry, its intrinsic efficiency was several orders higher than those generated in previous research using spatially separated scintillator arrays, because our camera measured the interactions inside the CZT detector array, wherein the detector elements were positioned very close to each other.

Original languageEnglish
Title of host publication2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)9781479960972
DOIs
Publication statusPublished - 2016 Mar 10
EventIEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014 - Seattle, United States
Duration: 2014 Nov 82014 Nov 15

Publication series

Name2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014

Other

OtherIEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014
CountryUnited States
CitySeattle
Period14/11/814/11/15

Keywords

  • CdZnTe
  • Compton Camera
  • Electronic Collimation
  • Frisch-Grid

ASJC Scopus subject areas

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

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