Patent ID: 8772726

Claim:
A detector tile of an imaging detector array, comprising: a scintillator array; a photosensor array optically coupled to the scintillator array, wherein the photosensor array includes a plurality of photosensitive pixels; a current-to-frequency (I/F) converter, including: an integrator that integrates charge output by a photosensitive pixel during an integration period and generates a signal indicative thereof; and a comparator that generates a pulse when the generated signal satisfies predetermined criteria during the integration period; a reset device that resets the integrator in response to the comparator generating a pulse; circuitry that samples the generated signal at a beginning of the integration period and/or at an end of the integration period and generates quantized digital data indicative thereof; and logic that estimates the charge at the input of the integrator ( 304 ) based on the generated digital data if the comparator generates less than a first predetermined number of pulses in the integration period.