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Three-dimensional restoration of single photon emission computed tomography images

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4 Author(s)
Boulfelfel, D. ; Dept. of Electr. & Comput. Eng., Calgary Univ., Alta., Canada ; Rangayyan, R.M. ; Hahn, L.J. ; Kloiber, R.

A 3-D filter was used for restoring SPECT (single photon emission computed tomography) images. The 3-D filter is shown to perform better than 2-D methods because it takes into consideration the interslice information in the filtering process and has a relatively space-invariant blur function. The potential of 3-D Wiener and power spectrum equalization filters was investigated. These filters were applied to SPECT images of a large, truncated conic phantom containing two types of cold spots, a sphere, and a triangular prism. The images were acquired on an ADAC GENESYS camera. A comparison was performed between results obtained in this study and those obtained by 2-D pre-reconstruction restoration and 2-D post-reconstruction restoration filters. Quantitative analysis of the 3-D restored images performed through measurement of root-mean-square errors and contrast ratios shows a considerable reduction in error and increase in contrast over images restored using the two other methods.<>

Published in:

Nuclear Science Symposium and Medical Imaging Conference, 1991., Conference Record of the 1991 IEEE

Date of Conference:

2-9 Nov. 1991