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Emission-transmission imaging system using single energy and dual energy transmission and radionuclide emission data

  • US 5,155,365 A
  • Filed: 07/09/1990
  • Issued: 10/13/1992
  • Est. Priority Date: 07/09/1990
  • Status: Expired due to Term
First Claim
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1. An emission-transmission imaging system comprisinga) an x-ray source for emitting a low energy x-ray spectrum and a high energy x-ray spectrum,b) detector means for simultaneously and selectively detecting photons corresponding to said low energy x-ray spectrum and said high energy x-ray spectrum and photons corresponding to radionuclide emission,c) means for positioning said x-ray source facing said detector means with an object positionable therebetween, said object having a radionuclide therein,d) data acquisition means connected with said detector means for receiving signals from said detector means representative of detected low energy x-ray spectrum photons, high energy x-ray spectrum photons, and radionuclide emission photons,e) computer means for receiving and processing said signals and producing image signals of distribution of a radionuclide in said object based on emission photon data as corrected for material-specific attenuation derived from dual energy x-ray transmission data, andf) display means responsive to said image signals.

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