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Maximum image restoration in nuclear medicine

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2 Author(s)
V. A. Oliveira ; Dept. de Electricidade, Escola de Engenharia de Sao Carlos, Brazil ; J. M. Nightingale

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.<>

Published in:

IEE Proceedings I - Communications, Speech and Vision  (Volume:137 ,  Issue: 3 )