Design and performance prediction of large-area hybrid gamma imaging system (LAHGIS) for localization of low-level radioactive material

Hyun Su Lee, Jae Hyeon Kim, Junyoung Lee, Chan Hyeong Kim

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

In the present study, a large-area hybrid gamma imaging system was designed by adopting coded aperture imaging on the basis of a large-area Compton camera to achieve high imaging performance throughout a broad energy range (100–2000 keV). The system consisting of a tungsten coded aperture mask and monolithic NaI(Tl) scintillation detectors was designed through a series of Geant4 Monte Carlo radiation transport simulations, in consideration of both imaging sensitivity and imaging resolution. Then, the performance of the system was predicted by Geant4 Monte Carlo simulations for point sources under various conditions. Our simulation results show that the system provides very high imaging sensitivity (i.e., low values for minimum detectable activity, MDA), thus allowing for imaging of low-activity sources at distances impossible with coded aperture imaging or Compton imaging alone. In addition, the imaging resolution of the system was found to be high (i.e., around 6°) over the broad energy range of 59.5–1330 keV.

Original languageEnglish
Pages (from-to)1259-1265
Number of pages7
JournalNuclear Engineering and Technology
Volume53
Issue number4
DOIs
StatePublished - 2021 Apr

Keywords

  • Coded aperture
  • Compton camera
  • Hybrid imaging
  • Monte Carlo simulation

Fingerprint

Dive into the research topics of 'Design and performance prediction of large-area hybrid gamma imaging system (LAHGIS) for localization of low-level radioactive material'. Together they form a unique fingerprint.

Cite this