Investigation Of Reconstructed Image Quality In Spect

Abstract

Several fundamental variables, which can significantly effect the quality of reconstructed images in single photon emission computed tomography (SPECT) obtained remain. These are attenuation, spatial resolution, scatter, and noise as well as linear and angular sampling. At present, serious controversy is the choice of angular data sampling. The question is whether angular data sampling around complete 360' rotation is necessary or a limited 180' arc would be sufficient. Data obtained from point source in addition to a three-dimensional analytical, non-stationary simulation study are used. The results of these studies have confirmed that the 180' reconstructed images suffer more severely than 360' images from variable geometric distortion.