Evaluation of sequence tracking methods for Compton cameras based on CdZnTe arrays

Jun Lee, Younghak Kim, Aleksey Bolotnikov, Wonho Lee

Research output: Contribution to journalArticlepeer-review

Abstract

In this study, the performance of sequence tracking methods for multiple interaction events in specific CdZnTe Compton imagers was evaluated using Monte Carlo simulations. The Compton imager consisted of a 6 × 6 array of virtual Frisch-grid CZT crystals, where the dimensions of each crystal were 5 × 5 × 12 mm3. The sequence tracking methods for another Compton imager that consists of two identical CZT crystals arrays were also evaluated. When 662 keV radiation was incident on the detectors, the percentages of the correct sequences determined by the simple comparison and deterministic methods for two sequential interactions were identical (~80%), while those evaluated using the minimum squared difference method (55–59%) and Three Compton method (45–55%) for three sequential interactions, differed from each other. The reconstructed images of a 662 keV point source detected using single and double arrays were evaluated based on their angular resolution and signal-to-noise ratio, and the results showed that the double arrays outperformed single arrays.

Original languageEnglish
Pages (from-to)4080-4092
Number of pages13
JournalNuclear Engineering and Technology
Volume53
Issue number12
DOIs
Publication statusAccepted/In press - 2021

Keywords

  • CZT detector
  • Compton camera
  • Multiple interaction events
  • Sequence tracking method

ASJC Scopus subject areas

  • Nuclear Energy and Engineering

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