1. A method comprising: receiving, by a system comprising a processor, a collimator-based optical image of a field of view related to a patient, a lens-based optical image of the field of view, and a gamma image of the field of view; determining, by the system, a resolution corruption function for optical imaging based on the collimator-based optical image of the field of view and the lens-based optical image of the field of view; approximating, by the system, a resolution corruption function for gamma imaging based on the resolution corruption function for optical imaging; enhancing, by the system, a resolution of the gamma image of the field of view based on the resolution corruption function for gamma imaging.