SPECT Image Reconstruction Using Compound Prior Models

SPECT images are observation data acquired by a gamma-camera following an orbit around the patient’s body, at regularly spaced angles. A reconstructed image is the discrete representation of a slice or cross-section of the isotope distribution within the patient, transversal to the gamma-camera rotation axis. Bayesian reconstruction methods have been extensively used to reconstruct medical images since they can improve the reconstructions with respect to the classical nonstatistical methods, such as FBP (Filtered Back Projection) and ART (Algebraic Reconstruction Techniques).