A photon-counting data acquisition module, comprising: - a signal input unit; - one or more data acquisition channels (14, 14a, 14b, 14c), each channel adapted for converting at least a first train of pulses from a first sub-pixel (120 1,1) and a second train of pulses from a second sub-pixel (120 1,2) received from the signal input unit to a counter signal; and - a signal output unit adapted for outputting the counter signal; wherein each data acquisition channel comprises a pulse maximum identifier (20, 20a, 20b, 20c) and a discriminator/counter pair (22, 22a, 22b, 22c) comprising a discriminator and a counter; wherein the pulse maximum identifier is configured to identify a maximum of a first pulse in the first received train of pulses and a maximum of a second pulse in the second received train of pulses; wherein the discriminator is configured to be triggered, by a detection of a maximum of a pulse in the at least first and second received trains of pulses, to compare the pulse with at least one signal threshold to generate the counter signal, or wherein the counter is configured to be enabled in response to a detection of a maximum of a pulse in the at least first and second received trains of pulses to generate the counter signal; characterized in that the data acquisition channel further comprises: - a selection logic configured to determine whether the maxima of the first pulse and the second pulse are within a coincidence window and to enable the discriminator to evaluate the first pulse in the first train of pulses or the second pulse in the second train of pulses directly if the maxima of the first and second pulses are not within the coincidence window, or a sum of the first and second pulses if the maxima of the first and second pulses are within the coincidence window. - a signal input unit; - one or more data acquisition channels (14, 14a, 14b, 14c), each channel adapted for converting at least a first train of pulses from a first sub-pixel (120 1,1) and a second train of pulses from a second sub-pixel (120 1,2) received from the signal input unit to a counter signal; and - a signal output unit adapted for outputting the counter signal; wherein each data acquisition channel comprises a pulse maximum identifier (20, 20a, 20b, 20c) and a discriminator/counter pair (22, 22a, 22b, 22c) comprising a discriminator and a counter; wherein the pulse maximum identifier is configured to identify a maximum of a first pulse in the first received train of pulses and a maximum of a second pulse in the second received train of pulses; wherein the discriminator is configured to be triggered, by a detection of a maximum of a pulse in the at least first and second received trains of pulses, to compare the pulse with at least one signal threshold to generate the counter signal, or wherein the counter is configured to be enabled in response to a detection of a maximum of a pulse in the at least first and second received trains of pulses to generate the counter signal; wherein each data acquisition channel comprises a pulse maximum identifier (20, 20a, 20b, 20c) and a discriminator/counter pair (22, 22a, 22b, 22c) comprising a discriminator and a counter; wherein the pulse maximum identifier is configured to identify a maximum of a first pulse in the first received train of pulses and a maximum of a second pulse in the second received train of pulses; wherein the discriminator is configured to be triggered, by a detection of a maximum of a pulse in the at least first and second received trains of pulses, to compare the pulse with at least one signal threshold to generate the counter signal, or wherein the counter is configured to be enabled in response to a detection of a maximum of a pulse in the at least first and second received trains of pulses to generate the counter signal; - a selection logic configured to determine whether the maxima of the first pulse and the second pulse are within a coincidence window and to enable the discriminator to evaluate the first pulse in the first train of pulses or the second pulse in the second train of pulses directly if the maxima of the first and second pulses are not within the coincidence window, or a sum of the first and second pulses if the maxima of the first and second pulses are within the coincidence window.