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Two dimensional detector array for CT scanners

  • US 5,592,523 A
  • Filed: 12/06/1994
  • Issued: 01/07/1997
  • Est. Priority Date: 12/06/1994
  • Status: Expired due to Fees
First Claim
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1. In a computerized tomographic scanner having an x-ray radiation source for selectively emitting penetrating x-ray radiation which traverses an examination area, an image reconstruction means for reconstructing images representative of the examination area using digital signals, a plurality of radiation detector arrays positioned opposite the radiation source each detector array having (i) a plurality of scintillation crystals arranged in an n×

  • m array, each of said scintillation crystals converting x-ray radiation into visible light, (ii) a substrate, and (iii) a plurality of photodetectors connected to the substrate, arranged in an n×

    m array, and optically coupled with the scintillation crystal array, each photodetector converting visible light into electrical charge, THE IMPROVEMENT COMPRISING;

    a plurality of charge storage devices formed on the substrate for accumulating and storing charge, each photodetector being selectively connected to a respective charge storage device for altering the analog charge stored thereby in accordance with the charge generated in response to received light;

    a plurality of amplifiers formed on the substrate and connected with the charge storage devices for selectively amplifying the stored analog charges; and

    an analog to digital converter formed on the substrate and connected with the amplifiers for converting the amplified analog charges into digital values.

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