The nuclear medicine image is composed primarily of contrast information with very little detail information. The reasons for low resolution images in nuclear medicine are many. They include instrument degradation, the nature of the imaged object and conventional methods of recording data on Polaroid film. This paper discussed in some detail the cause of low resolution images in nuclear medicine and possible methods of improving image detail. Recent research in the use of the computer for image improvement is described. Both spatial domain and frequency domain computerized image enhancement were discussed.