We designed a magnetic resonance (MR) compatible depth-encoding detector using cross point and dual-ended readout methods with wavelength-shifting (WLS) fibers. To evaluate the performance of the novel detector
module, we used the DETECT2000 simulation tool to model the transport of optical photons in the crystal array. The detector is composed of two layers of crystal arrays, three layers of WLS fiber arrays, and two sensor
arrays. The identification of crystal pixels was determined by the cross point readout method using a digital positioning algorithm, and the depth information in each crystal pixel was measured by the dual-ended
readout method. The average pixel identification accuracy was 93.5 % (range: 84.4 %-100 %).