Abstract

An important problem in radioisotope scintigraphy restoration is the compensation for the finite angular resolution (beam-width) of the collimator. The point spread function of the Anger camera is depth dependent. Consequently, apart from the well-known noise problems, compensation of a scintigraphic image (finite angular beam projection of an object) for resolution at all depths is difficult. One obvious approach would be to deconvolve the image based on the point spread function at some nominal depth. Here a method is proposed that more exactly compensates for the collimator's finite angular resolution. The method applies to planar imaging but can be adapted for tomography. For a given nominal viewing direction, a set of multiple images is acquired. One view is acquired along a nominal direction, and others at small angles away from this nominal, such that this set of view directions form a bundle about the nominal. By a linear superposition of these views, it is possible to synthesize a view for the nominal direction that has enhanced angular resolution.

© 1989 Optical Society of America