A ∼0.7 mm spatial resolution all-digital animal PET system using improved trans-PET detectors

Spatial resolution is one of the most important performance in PET system. Higher spatial resolution can give more information about the region of interest in animal PET imaging. In this work, we implement a high resolution (approximate 0.7 mm) all digital animal PET system using improved Trans-PET detectors. The improved detector module uses 24×24 crystal array for higher intrinsic spatial resolution and each elements is 1.0×1.0×13.0mm³. The detector has an overall energy resolution of 13.8% FWHM @ 511keV. In addition, our preliminary imaging study shows that the all digital animal PET system can resolve 0.7 mm diameter rods separated by 1.4 mm.