RADIATION IMAGE DETECTING SYSTEM

A radiation image detecting system with the image divided into pixels. In this system the pixel signals are detected with a method of coded aperture. All the pixels are grouped into equal-sized areas, each of which includes the same number of pixels forming a square sub-matrix of pixels. The pixel signals corresponding to the pixels contained in the above sub-matrix are obtained in the form of coded signals by being detected a plurality number of times successively with a plurality of sensor groups which are made purposefully different from one another in the number, arrangement pattern and size of the sensors.