Evaluation of a Compton scattering camera using 3-D position sensitive CdZnTe detectors

Abstract A CZT Compton Camera (CCC) is being built using two three-dimensional (3-D) position-sensitive CZT detectors. Expected system performance was analyzed by analytical and Monte Carlo approaches. Based on the measurement of detector energy and position resolution, the expected angular resolution is ∼3° and ∼2° for a ±30° FOV for 511 keV and 1 MeV γ -rays, respectively. The intrinsic efficiency for a point source 10 cm from the first detector surface ranges from 1.5×10 −4 to 8.8×10 −6 for 500 keV–3 MeV.