Data acquisition system of photon counting detector array

摘要

Among other things, one or more techniques and/or systems are described for generating an output of a detector cell of a photon counting detector array. A counter block generates integration data and photon counting data associated with the photon counting detector array. Responsive to a number of detection events counted during a measurement interval (e.g., a view) not exceeding a first detection event count threshold, a first output may be generated based upon the photon counting data. Responsive to the number of detection events exceeding a second detection event count threshold, a second output may be generated based upon the integration data. Responsive to the number of detection events being between the first detection event count threshold and the second detection event count threshold, a blended output may be generated based upon the photon counting data and the integration data.

主权项

1. An electronics arrangement of a photon counting detector array, comprising:
an integration circuit configured to integrate charge generated by a detector cell of the photon counting detector array to generate a voltage signal; a charge injection circuit configured to inject a charge into the integration circuit in response to the voltage signal exceeding a specified threshold, the injected charge configured to reset the integration circuit; a photon counting circuit configured to identify detection events based upon the voltage signal; and a counter block configured to:
generate integration data indicative of an amount of charge integrated by the integration circuit during a measurement interval based upon a number of resets to the integration circuit during the measurement interval;generate photon counting data indicative of a number of detection events identified by the photon counting circuit during the measurement interval; andresponsive to the number of detection events being between a first detection event count threshold and a second detection event count threshold for the measurement interval:
apply a first blending weight to the integration data to create weighted integration data;apply a second blending weight to the photon counting data to create weighted photon counting data; andgenerate a blended output based upon the weighted integration data and the weighted photon counting data.