n visual system. However, an inherent blurring of the image limits the amount of useful information which can he extracted from it. Attempts have been made to restore the image by compensating for the degradation. By expressing the radioisotope image as a convolution integral of a true radioisotope distribution w, ith the spatial resolution of the imaging system. and by using an iterative a pproximatio mnethod for the evaluation of the integral a. ‘restored image’ is obtained. An experimenta relsult on a profile scan demonstrate tshe applicability of the method to radioisotop iemaging systems.

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