Assessment of SPECT Uniformity by Using Image Processing Technique

Abstract

The main objective is to apply a new quantitative uniformity analysis technique to the gamma camera uniformity test. The results in this study carried out using computerized method in which a home-built Matlab program has been used. The images offered as a (TIFF) format then using Matlab the images were accessed. The region of interest was determined using crop function, and then it was smoothed by (7×7) window to reduce image noise. Then the uniformity parameters were calculated by finding the maximum and the minimum counts intensity. The regions of interest have been displayed in a (3D) surface for better visualization of the uniformity as an objective method rather than the subjective method (the visual perception). The result of this study showed that there is a strong correlation between the intensity (maximum & minimum) of the image and theuniformity parameters (integral uniformity & differential uniformity).In conclusion, we create own program to quantify uniformity data base.