DESIGN STUDIES OF A DEPTH ENCODING LARGE-APERTURE PET CAMERA

The feasibility of a wholebody PET tomograph with the capacity to correct for the parallax error induced by the ]Depth-Of-Interaction of gamma-rays is assessed through simulation, The experimental energy, depth, and transverse position resolutions of EGO block detector candidates are the main inputs to a simulation that predicts the point source resolution of the Depth Encoding Large Aperture Camera (DELAC). The results indicate that a measured depth resolution of 7 mm (FWHM) is sufficient to correct a substantial part of the parallax error for a point source at the edge of the Field-Of-View. A search for the block specifications and camera ring radius that would optimize the spatial resolution and its uniformity across the Field-Of-View is also presented.