Detection efficiencies of parallel, fan and cone beam collimators for source distributions in an attenuating medium

B. M.W. Tsui, D. P. Lewis, J. Li

Research output: Contribution to conferencePaper

Abstract

Fan-beam (FB) and cone beam (CB) collimators have been applied in SPECT due to their improved trade-off between spatial resolution and detection efficiency when compared with conventional parallel-hole (PH) collimators. This paper studies the detection efficiencies of these three collimator geometries in more realistic imaging situations. Theoretical formulations are derived for the detection for point and line sources placed in air and inside attenuating media with attenuation effect only. The effects of scatter are investigated using Monte Carlo simulation methods. For primary photons with and without attenuation effect, theoretical predictions agreed with the results from Monte Carlo simulations. The signal-to-noise ratios of the FB and CB are higher than that of the PH collimator and the differences increase with source depth.

Original languageEnglish (US)
Pages1145-1149
Number of pages5
StatePublished - Jan 1 1995
Externally publishedYes
EventProceedings of the 1994 Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 4) - Norfolk, VA, USA
Duration: Oct 30 1994Nov 5 1994

Other

OtherProceedings of the 1994 Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 4)
CityNorfolk, VA, USA
Period10/30/9411/5/94

ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Industrial and Manufacturing Engineering

Fingerprint Dive into the research topics of 'Detection efficiencies of parallel, fan and cone beam collimators for source distributions in an attenuating medium'. Together they form a unique fingerprint.

  • Cite this

    Tsui, B. M. W., Lewis, D. P., & Li, J. (1995). Detection efficiencies of parallel, fan and cone beam collimators for source distributions in an attenuating medium. 1145-1149. Paper presented at Proceedings of the 1994 Nuclear Science Symposium and Medical Imaging Conference. Part 1 (of 4), Norfolk, VA, USA, .