Development of a Position-Sensitive 4π Compton Camera Based on a Single Segmented Scintillator

Hyounggun Lee, Taewoong Lee, Wonho Lee

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)


Scintillator-based Compton cameras, which comprise of a separated scatter and absorption detectors, neglect the Compton scattering that is followed by a photoelectric effect in a single set of scintillators, wherein the detection efficiency is severely limited. In this study, we propose a 3-D position-sensitive Compton camera that uses a single set of scintillators, wherein radiation interactions inside the scintillator can be discriminated. The proposed Compton camera comprises a segmented lutetium-yttrium oxyorthosilicate scintillator coupled with two position-sensitive silicon photomultipliers on both sides. Compton image reconstruction algorithms, such as simple back-projection, list-mode maximum likelihood expectation maximization (MLEM), and filtered back-projection, were applied and compared. The single position-sensitive Compton camera identified the positions of multiple radiation sources with various energies in a $4\pi $ field of view. The signal-to-noise ratio (SNR) and full-width at half-maximum (FWHM) of a reconstructed 511-keV point source were approximately 12° and 22°, respectively, after MLEM was applied, and the two 511-keV sources with an angle difference of 40° were separately reconstructed. The intrinsic efficiency of the proposed Compton camera was $2.23\times 10^{-2}$ for 511 keV.

Original languageEnglish
Article number9264252
Pages (from-to)2511-2522
Number of pages12
JournalIEEE Transactions on Nuclear Science
Issue number12
Publication statusPublished - 2020 Dec

Bibliographical note

Funding Information:
Manuscript received July 2, 2020; revised September 23, 2020; accepted November 7, 2020. Date of publication November 19, 2020; date of current version December 16, 2020. This work was supported in part by the Nuclear Safety Research Program of the Korea Foundation of Nuclear Safety (KoFONS) through the Nuclear Safety and Security Commission (NSSC) of the South Korea under Grant 1903006 and in part by the National Research Foundation of Korea (NRF) Grant funded by the Korea Government (MSIT) under Grant 2020R1A2C1005924.

Publisher Copyright:
© 1963-2012 IEEE.


  • Nuclear facility regulation
  • nuclear imaging
  • radioactive pollution
  • solid scintillators

ASJC Scopus subject areas

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


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