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Multiple energy detector

  • US 10,156,642 B2
  • Filed: 03/02/2016
  • Issued: 12/18/2018
  • Est. Priority Date: 03/04/2015
  • Status: Active Grant
First Claim
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1. A multi-energy detector for detecting incident radiation, comprising:

  • a scintillator material adapted to convert the incident radiation into a plurality of optical photons;

    an array of pixel circuits, wherein each pixel circuit comprises a single photon avalanche diode (SPAD) coupled to a threshold detector, wherein each SPAD is optically coupled to the scintillator material and adapted to generate a current in response to detecting one or more optical photons, and a threshold detector in electrical communication with the SPAD, wherein the threshold detector configured to generate a digital pulse in response to said current; and

    processing electronics for processing the digital pulse from each pixel circuit in said array of pixel circuits and converting said digital pulse into an energy profile of the incident radiation, wherein the processing electronics comprises an accumulator configured to generate a pixel count, a latching register configured to receive the pixel count from the accumulator and store the pixel count, a digital buffer configured to receive the pixel count from the latching register and buffer the pixel count, and a digital pulse processor configured to receive the buffered pixel count from the digital buffer, determine a specific energy value, and transmit the energy value to a range shifter.

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