A diagnostic imaging device comprising: a signal processing circuit which processes hit signals from a detector array which detects radiation from an imaging region, the hit signals being indicative of a corresponding detector being hit by a radiation photon, the signal processing circuit including: a plurality of input channels (32 1, 32 2, 32 3, 32 4), each input channel receiving hit signals from a corresponding detector element such that each input channel (32 1, 32 2, 32 3, 32 4) corresponds to a location at which each hit signal is received; a plurality of integrators for integrating signals from the input channels to determine an energy value associated with each radiation hit; a plurality of analog-to-digital converters (44 1, 44 2, 44 3, 44 4) for converting the integrated energy value into a digital energy value; a register and read out which reads out the locations, the digital energy values, and the digital time stamps for hit signals; characterized in that the signal processing circuit further comprises: a plurality of time to digital converters that receive the hit signals and generate a digital time stamp; OR logic (36, 38) that relays signal hits from a subset of the plurality of input channels to one of the ADC and one of the time to digital converters, wherein the subset of the plurality of input channels includes individual input channels that are connected to detectors which are physically separated from each other, the subset including more than one input channel such that more than one input channel is connected with each ADC and/or each time-to-digital converter. a signal processing circuit which processes hit signals from a detector array which detects radiation from an imaging region, the hit signals being indicative of a corresponding detector being hit by a radiation photon, the signal processing circuit including: a plurality of input channels (32 1, 32 2, 32 3, 32 4), each input channel receiving hit signals from a corresponding detector element such that each input channel (32 1, 32 2, 32 3, 32 4) corresponds to a location at which each hit signal is received; a plurality of integrators for integrating signals from the input channels to determine an energy value associated with each radiation hit; a plurality of analog-to-digital converters (44 1, 44 2, 44 3, 44 4) for converting the integrated energy value into a digital energy value; a plurality of input channels (32 1, 32 2, 32 3, 32 4), each input channel receiving hit signals from a corresponding detector element such that each input channel (32 1, 32 2, 32 3, 32 4) corresponds to a location at which each hit signal is received; a plurality of integrators for integrating signals from the input channels to determine an energy value associated with each radiation hit; a plurality of analog-to-digital converters (44 1, 44 2, 44 3, 44 4) for converting the integrated energy value into a digital energy value; a register and read out which reads out the locations, the digital energy values, and the digital time stamps for hit signals; characterized in that the signal processing circuit further comprises: a plurality of time to digital converters that receive the hit signals and generate a digital time stamp; OR logic (36, 38) that relays signal hits from a subset of the plurality of input channels to one of the ADC and one of the time to digital converters, wherein the subset of the plurality of input channels includes individual input channels that are connected to detectors which are physically separated from each other, the subset including more than one input channel such that more than one input channel is connected with each ADC and/or each time-to-digital converter. a plurality of time to digital converters that receive the hit signals and generate a digital time stamp; OR logic (36, 38) that relays signal hits from a subset of the plurality of input channels to one of the ADC and one of the time to digital converters, wherein the subset of the plurality of input channels includes individual input channels that are connected to detectors which are physically separated from each other, the subset including more than one input channel such that more than one input channel is connected with each ADC and/or each time-to-digital converter.