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Stationary computed tomography system with compact x ray source assembly

  • US 7,068,749 B2
  • Filed: 05/19/2003
  • Issued: 06/27/2006
  • Est. Priority Date: 05/19/2003
  • Status: Expired due to Fees
First Claim
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1. A stationary CT system comprising:

  • at least one annular x ray source assembly comprising a plurality of respective x ray sources spaced along said annular x ray source assembly,wherein each of said respective x ray sources comprises a respective stationary x ray target;

    an electron beam focusing chamber;

    an x ray channel; and

    an electron beam source disposed in a spaced apart relationship with respect to said respective stationary x ray target, and wherein said electron beam focusing chamber comprises a top section and a bottom section disposed in a spaced relationship to one another so as to have a selected cross-sectional profile so as to focus a plurality of electrons emitted from said electron beam source to impinge on said respective stationary x ray target to produce x rays that pass into said x ray channel, the top section further being configured to receive back-scattered electrons generated by the electron beam impact at the respective stationary x ray target and predominantly redirect the back-scattered electrons away from said electron beam source,wherein said top section of said electron beam focusing chamber comprises a plurality of grooves located opposite said respective stationary x ray target to trap a plurality of back-scattered electrons and prevent said plurality of back-scattered electrons from hitting said respective stationary x ray target.

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