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Digital angiography system with automatically determined frame rates

  • US 5,544,215 A
  • Filed: 01/13/1995
  • Issued: 08/06/1996
  • Est. Priority Date: 01/13/1995
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of generating diagnostic images at a plurality of overlapping positions along a patient including at least first, second, and third contiguous positions, the method comprising:

  • selecting at least a first set of reference dwell times during which the diagnostic images are to be generated at the first position and a first selected imaging rate at which the diagnostic images are to be generated at the first position, a second set of reference dwell times over which the diagnostic images are to be generated at the second position, a third set of reference dwell times over which the diagnostic images are to be generated at the third position;

    injecting the subject with a radiopaque dye adjacent the first position;

    at the first position, generating the diagnostic images at the first imaging rate and displaying the generated diagnostic images on a human-readable display;

    manually indexing to the second position in accordance with the human-readable display;

    measuring a first actual dwell time over which the diagnostic images are generated at the first position;

    comparing the first actual dwell time with the first set of reference dwell times;

    adjusting the second imaging rate in accordance with the comparison between the first actual and reference dwell times;

    at the second position, generating the diagnostic images at the adjusted second imaging rate and converting the generated images into a human-readable display;

    manually indexing to the third position in accordance with the human-readable display;

    measuring a second actual dwell time over which images are generated at the second position;

    comparing the first and second actual dwell times with the reference dwell times;

    adjusting the third imaging rate in accordance with the comparison between the actual and reference dwell times;

    at the third position, generating the diagnostic images at the adjusted third imaging rate and converting the generated images into a human-readable display.

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