Likelihood window, energy window, and Bayesian window for scatter rejection in gamma cameras

J. C. Chen, H. H. Barrett

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

6 Scopus citations

Abstract

All gamma cameras used in nuclear medicine have finite energy resolution. Therefore, they cannot perfectly discriminate scattered from unscattered radiation. Different scatter correction methods have been developed to reduce this effect, but it is better to reject scatter events in data acquisition instead of doing scatter correction afterwards. Most conventional ways of rejecting scatter events use energy windows (EWs). An alternative introduced by Milster et al. is the likelihood window (LW). We use this method in our modular gamma scintillation camera that has a 2×2 array of photomultipliers (PMTs) coupled to a NaI(Tl) crystal. We have developed yet another scatter rejection scheme, the Bayesian window (BW). In contrast to the LW and EW, the BW takes into account the simulated or actual scatter spectrum in making a decision to accept or reject a particular photon. The purpose of this paper is to compare the effectiveness of scatter rejection by BW, LW, and EW.

Original languageEnglish (US)
Title of host publicationIEEE Nuclear Science Symposium & Medical Imaging Conference
PublisherPubl by IEEE
Pages1414-1416
Number of pages3
Editionpt 3
ISBN (Print)0780314875
StatePublished - 1994
EventProceedings of the 1993 IEEE Nuclear Science Symposium & Medical Imaging Conference - San Francisco, CA, USA
Duration: Oct 30 1993Nov 6 1993

Publication series

NameIEEE Nuclear Science Symposium & Medical Imaging Conference
Numberpt 3

Other

OtherProceedings of the 1993 IEEE Nuclear Science Symposium & Medical Imaging Conference
CitySan Francisco, CA, USA
Period10/30/9311/6/93

ASJC Scopus subject areas

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

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