Imaging Performance Measurements For A 1mm(3) Resolution Clinical Pet System

BREAST cancer is the most common cancer in women [1]. High-resolution, breast-dedicated PET can provide complementary information to guide cancer management, alongside traditional imaging modalities such as mammography, MRI, and ultrasound [2]. A dual-panel PET camera dedicated to breast imaging (Fig. 1) is being constructed and tested in our lab, with high sensitivity, 1mm 3 spatial resolution, and capability for 3-D positioning of one or more interactions per event. Each 8×8 LYSO crystal array is coupled to a position-sensitive avalanche photodiode (PSAPD), and 2 PSAPDs are multiplexed together into a dual-module, which provides energy, timing, and crystal identification capabilities [3]. 16 dual-modules are assembled side-by-side to form a detector layer, 8 detector layers are stacked vertically to form a cartridge, and 9 cartridges make up one detector head for a total panel area of ∼10 × 16cm 2 .