Portable and active collimation imager using URA patterned scintillator

Taewoong Lee, Wonho Lee

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

2 Citations (Scopus)

Abstract

A portable and active collimator using systematically patterned scintillators was constructed and its performance was evaluated. The conventional (passive) radiation collimation method involved passing radiation through a single or multiple holes in the collimator, but it discarded scattered radiation. However, the new collimation method, in which the collimator itself is replaced by a radiation detector, uses not only radiation which passed through holes but also the scattered radiation in the collimator. The active collimator was composed of URA (Uniformly Redundant Array) patterned BGO scintillators and a CsI(Na) planar array positioned at the back of the collimator. The passing of radiation through the holes of the URA collimator was reconstructed using the correlation method of conventional coded apertures, while the scattered radiation in the active collimator, if detected in the planar detector, was recovered using a Compton imaging technique. Since the active collimation method uses Compton scattering events as well as photoelectric effect events, its detection efficiency and energy range are inherently higher than those of conventional collimation methods. The reconstructed images of the portable and active collimation methods for various energy sources were obtained and compared with those of conventional methods.

Original languageEnglish
Title of host publication2011 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2011
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages1892-1895
Number of pages4
ISBN (Print)9781467301183
DOIs
Publication statusPublished - 2011
Event2011 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2011 - Valencia, Spain
Duration: 2011 Oct 232011 Oct 29

Publication series

NameIEEE Nuclear Science Symposium Conference Record
ISSN (Print)1095-7863

Other

Other2011 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2011
CountrySpain
CityValencia
Period11/10/2311/10/29

ASJC Scopus subject areas

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

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  • Cite this

    Lee, T., & Lee, W. (2011). Portable and active collimation imager using URA patterned scintillator. In 2011 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS/MIC 2011 (pp. 1892-1895). [6154381] (IEEE Nuclear Science Symposium Conference Record). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/NSSMIC.2011.6154381