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Method and apparatus for producing CT images

  • US 6,381,487 B1
  • Filed: 11/29/1999
  • Issued: 04/30/2002
  • Est. Priority Date: 11/27/1998
  • Status: Expired due to Term
First Claim
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1. A method for producing computed tomography images of a body region in an examination subject, said body region exhibiting a substantially periodic movement cycle containing a resting phase and a motion phase, comprising the steps of:

  • rotating a focus of an x-ray source around said examination subject through at least one revolution during a time duration that is at least equal to a duration of said cycle, and registering a plurality of sets of projection data, said different sets of projection data respectively representing x-rays attenuated by said examination subject from a plurality of different projection angles;

    analyzing said sets of projection data to determine whether each set of projection data was acquired during a resting phase or a motion phase of said cycle; and

    reconstructing an image of said body region of said examination subject using only data from said sets of projection data that are determined by the analyzing of said sets of projection data to have been obtained during a resting phase of said cycle.

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