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Methods and apparatus for non-uniform rotation distortion detection in an intravascular ultrasound imaging system

  • US 5,921,934 A
  • Filed: 11/25/1997
  • Issued: 07/13/1999
  • Est. Priority Date: 11/25/1997
  • Status: Expired due to Term
First Claim
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1. A method for detecting non-uniform rotation distortion in an intravascular ultrasound blood vessel image, said method comprising the steps of:

  • providing a catheter probe within a blood vessel, said catheter probe having a sheath and a transducer substantially centrally located within said sheath, wherein said transducer is mechanically controlled and said catheter probe including a bubbly liquid between said sheath and said transducer;

    emitting an ultrasonic beam to produce echoes reflected from said bubbly liquid and said sheath to obtain a given image vector;

    sampling said echoes in a plurality of time windows for said given image vector;

    correlating said sampled echoes in said plurality of time windows to determine existence of non-uniform rotational speed of said transducer.

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