Abstract: An electronic imager includes a detector array, a plurality of processing circuits, each responsive to an output signal from a respective detector element of the array and to a determination that signal coupling in general or charge sharing in particular occurred. The imager further includes a shared channel circuit coupled to at least two processing circuits for receiving an output signal from the processing circuits in response to a determination that signal coupling has occurred and for generating an output signal in response to the received signals. The shared channel circuit further directs the output signal to an image sub-pixel, wherein a plurality of sub-pixels are associated with each radiation sensitive element.

Abstract: An electronic imager capable of performing selectable signal processing functions on measured pixel signals includes fixed digital logic circuitry. The imager includes a detector array comprising a plurality of pixels, an analog-to-digital conversion circuit responsive to an output signal from at least one pixel and to at least one threshold signal for converting the pixel output signal into a digital signal, and a digital logic circuit responsive to the digital signal for providing an output signal related to the pixel signal by a selectable function. Different signal processing functions are selected by varying the threshold signal provided to the analog-to-digital conversion circuit.

Abstract: An electronic imager capable of performing selectable signal processing functions on measured pixel signals includes fixed digital logic circuitry. The imager includes a detector array comprising a plurality of pixels, an analog-to-digital conversion circuit responsive to an output signal from at least one pixel and to at least one threshold signal for converting the pixel output signal into a digital signal, and a digital logic circuit responsive to the digital signal for providing an output signal related to the pixel signal by a selectable function. Different signal processing functions are selected by varying the threshold signal provided to the analog-to-digital conversion circuit.

Abstract: An electronic imager includes a detector array, a plurality of processing circuits, each responsive to an output signal from a respective detector element of the array and to a determination that signal coupling in general or charge sharing in particular occurred. The imager further includes a shared channel circuit coupled to at least two processing circuits for receiving an output signal from the processing circuits in response to a determination that signal coupling has occurred and for generating an output signal in response to the received signals. The shared channel circuit further directs the output signal to an image sub-pixel, wherein a plurality of sub-pixels are associated with each radiation sensitive element.

Abstract: An x-ray detector is designed to operate as an imaging spectrometer for imaging of a subject. The x-ray detector measures energy of individual x-ray photons in each of a plurality of pixels in the x-ray detector. The pixels of the x-ray detector are readout at a rate such that the likelihood of arrive of more than one x-ray photon in each pixel during a readout period is negligible. Because x-ray photons with different energy levels will create different magnitude responses in the x-ray detector, the measurements made by the x-ray detector can be weighted according to the energy level of the detected x-ray photons. Thus, responses due to noise or x-ray photons which contribute little or no x-ray attenuation information can be discarded or weighted to eliminate or reduce their effect on any resulting image. Conversely, measurements due to x-ray photons which provide significant attenuation information can be weighted significantly.