Abstract
The qualities of images obtained in scintigraphic devices are limited because of poor statistics and finite resolving power of the devices and collimators. Thus, processing of the image data such as smoothing, image enhancement, reduction of high frequency noise, boundary detection, etc. may improve information transfer to the human viewers. Improvement of the quality of nuclear medicine images has been attempted by using various filtering techniques. They can be classified into two types: the space-domain filtering and the frequency-domain filtering. This paper analyzed the usefulness and limitations of the technique using the space-domain filtering by comparing the calculation results of entropy in the images processed by various digital filters.
