Embodiments of the present invention provide a computer-implemented method for parallel readout for an X-ray image sensor module having a pixel array. Specifically, among other things, embodiments of the present invention provide a computer-implemented infrastructure comprising: capturing an electrical signal at each of a plurality of pixels within the pixel array; converting each of the captured electrical signals into a respective voltage; comparing each of the respective voltages with a reference voltage to discriminate whether the electric signal from the sensor represents a photon detection; counting a photon detection for each of the plurality of pixels within the pixel array based upon an output of the comparator; connecting all pixels in each of the columns; and sequentially selecting said rows of pixels for readout over the column bus lines at a sensor output.