New method for modeling the spatially-variant, object-dependent scatter response function in SPECT

Research output: Contribution to conferencePaper

Abstract

Scatter compensation using iterative reconstruction results in improved image quality and quantitative accuracy compared to subtraction-based methods. However, this requires knowledge of the spatially-varying, object-dependent scatter response function (SRF). We have previously developed a method, slab derived scatter estimation (SDSE) for estimating the SRF. However, this method has reduced accuracy for nonuniform attenuators and Tl-201 imaging. In this paper we present a new method which provides better modeling of the SRF for Tl-201 SPECT, and should provide improved accuracy for nonuniform attenuators. The method requires 3 image space convolutions and an attenuated projection for each viewing angle. Implementation in a projector-backprojector pair for use with an iterative reconstruction algorithm would require 2 image space Fourier transforms and 6 image space inverse Fourier transforms per iteration. We observed good agreement between SRFs and projection data estimated using this new model compared to those obtained using Monte Carlo simulations.

Original languageEnglish (US)
Pages1082-1086
Number of pages5
StatePublished - Dec 1 1996
Externally publishedYes
EventProceedings of the 1996 IEEE Nuclear Science Symposium. Part 1 (of 3) - Anaheim, CA, USA
Duration: Nov 2 1996Nov 9 1996

Other

OtherProceedings of the 1996 IEEE Nuclear Science Symposium. Part 1 (of 3)
CityAnaheim, CA, USA
Period11/2/9611/9/96

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ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Industrial and Manufacturing Engineering

Cite this

Frey, E. C., & Tsui, B. M. W. (1996). New method for modeling the spatially-variant, object-dependent scatter response function in SPECT. 1082-1086. Paper presented at Proceedings of the 1996 IEEE Nuclear Science Symposium. Part 1 (of 3), Anaheim, CA, USA, .