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.
|Title of host publication||2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014|
|Publisher||Institute of Electrical and Electronics Engineers Inc.|
|Publication status||Published - 2016 Mar 10|
|Event||IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014 - Seattle, United States|
Duration: 2014 Nov 8 → 2014 Nov 15
|Name||2014 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014|
|Other||IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2014|
|Period||14/11/8 → 14/11/15|
Bibliographical noteFunding Information:
This work was supported by U.S. Department of Energy, Office of Defense Nuclear Nonproliferation Research & Development, DNN R&D, U.S. Defense Threat Reduction Agency (DTRA) and BNL's Technology Maturation Award. The manuscript has been authored by Brookhaven Science Associates, LLC under Contract no. DE-AC02-98CH1-886 with the U. S. Department of Energy. This work was supported by the BK21plus (21A20132212094) and National Research Foundation of Korea (NRF) grant (2012M2AA401092) funded by the Korean government (MEST).
© 2014 IEEE.
- Compton Camera
- Electronic Collimation
ASJC Scopus subject areas
- Nuclear and High Energy Physics
- Radiology Nuclear Medicine and imaging