Theoretical study of the contrast recovery and variance of MAP reconstructiions with applications to the selection of smoothing parameters

Jinyi Qi, Richard M. Leahy

Research output: Chapter in Book/Report/Conference proceedingChapter

1 Scopus citations

Abstract

We examine the spatial resolution and variance properties of PET images reconstructed using maximum a posteriori (MAP) or penalized-likelihood methods. Resolution is characterized by the contrast recovery coefficient (CRC) of the local impulse response. Simplified approximate expressions are derived for the local impulse response CRCs and variances for each voxel. Using these results we propose a practical scheme for selecting spatially variant smoothing parameters to optimize lesion detectability through maximization of the local CRC-to-noise ratio in the reconstructed image.

Original languageEnglish (US)
Title of host publicationIEEE Nuclear Science Symposium and Medical Imaging Conference
Place of PublicationPiscataway, NJ, United States
PublisherIEEE
Pages2078-2085
Number of pages8
Volume3
ISBN (Print)0780350227
Publication statusPublished - 1999
Externally publishedYes
EventProceedings of the 1998 IEEE Nuclear Science Symposium Conference Record - Toronto, Que, Can
Duration: Nov 8 1998Nov 14 1998

Other

OtherProceedings of the 1998 IEEE Nuclear Science Symposium Conference Record
CityToronto, Que, Can
Period11/8/9811/14/98

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ASJC Scopus subject areas

  • Computer Vision and Pattern Recognition
  • Industrial and Manufacturing Engineering

Cite this

Qi, J., & Leahy, R. M. (1999). Theoretical study of the contrast recovery and variance of MAP reconstructiions with applications to the selection of smoothing parameters. In IEEE Nuclear Science Symposium and Medical Imaging Conference (Vol. 3, pp. 2078-2085). Piscataway, NJ, United States: IEEE.