A dual array detector module 12 adapted to radiation-imaging, particularly X ray imaging, comprising a first detector array 1a consisting of a plurality of first detectors and arranged on a first surface of a heavy metal plate 5 a second detector array 1b consisting of a plurality of second detectors and arranged on a second surface of the heavy metal plate 5, the second surface is opposite to the first surface and a mounting frame 4 in which the first detector array and the second detector array arranged on the first and second surfaces of the heavy metal plate respectively are mounted in the mounting frame. The dual array detector module aims to increase the speed of x ray imaging whilst reducing cross talk.