Maximum image restoration in nuclear medicine

Author

Oliveira, V.A. ; Nightingale, J.M.

Author_Institution

Dept. de Electricidade, Escola de Engenharia de Sao Carlos, Brazil

Volume

137

Issue

3

fYear

1990

fDate

6/1/1990 12:00:00 AM

Firstpage

163

Lastpage

169

Abstract

The problem of image restoration from noisy measurements as encountered in nuclear medicine is considered. A model for the emission/detection process is introduced, which is based on the Poisson statistics of the emissions and a point-spread function for the imaging system. A new approach for treating the measurements is given, in which they are represented by a spatial noncausal interaction model before maximum entropy restoration, which describes the statistical dependence among the image values and their neighbourhood. The particular application of the algorithms presented relates to gamma-ray imaging systems, and is aimed at improving the resolution-noise-suppression product. Results for actual gamma camera data are presented and compared with more conventional techniques.<>

Keywords

gamma-ray detection and measurement; interference suppression; patient diagnosis; picture processing; radioisotope scanning and imaging; Poisson statistics; emission/detection process; gamma camera data; gamma-ray imaging systems; image restoration; maximum entropy restoration; noisy measurements; nuclear medicine; patient diagnosis; point-spread function; resolution-noise-suppression product; spatial noncausal interaction model;

fLanguage

English

Journal_Title

Communications, Speech and Vision, IEE Proceedings I

Publisher

iet

ISSN

0956-3776

Type

jour

Filename

218069