Simultaneous compensation for attenuation, scatter and detector response for SPECT reconstruction in three dimensions.

Published

Journal Article

A three-dimensional reconstruction method for simultaneous compensation of attenuation, scatter and distance-dependent detector response for single photon emission computed tomography is described and tested by experimental studies. The method determines the attenuation factors recursively along each projection ray starting at the intersected source voxel closest to the detector. The method substracts the scatter energy window data from the primary energy window data for scatter compensation. The detector response is modelled to be spatially invariant at a constant distance from the detector. The method convolves source distribution with the modelled response function to compensate for the smoothed by use of a non-uniform entropy prior to searching for the maximum a posteriori probability solution. The method was tested using projections acquired from a chest phantom by a three-headed detector system with parallel hole collimators. An improvement was shown in image noise, recognition of object sizes and shapes, and quantification of concentration ratios.

Full Text

Duke Authors

Cited Authors

  • Liang, Z; Turkington, TG; Gilland, DR; Jaszczak, RJ; Coleman, RE

Published Date

  • March 1992

Published In

Volume / Issue

  • 37 / 3

Start / End Page

  • 587 - 603

PubMed ID

  • 1565692

Pubmed Central ID

  • 1565692

International Standard Serial Number (ISSN)

  • 0031-9155

Language

  • eng

Conference Location

  • England