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Ultrasound spectral broadening

  1. Jan 20, 2016 #1
    I am slightly confused about the causes of spectral broadening and reverse flow in duplex ultrasound so wanted to clarify if I am correct.
    Here is my understanding. Is it correct?
    - Spectral broadening typically occurs in areas of parabolic laminar flow, distrurbed flow or turbulent flow because the range of velocities is wide

    - Reverse flow has to do with the way an incoming pressure wave from the heart during systole interacts with reflected pressure waves from terminal capilaries. The two pressure waves subtract from each other resulting in a net pressure gradient. Blood will flow from high to low pressure regions (unless its inertia stops it from doing so). Pressure wave reflection can cause a distribution in the velocity range of blood at a particular point and can thus cause spectral broadening too?

    Is this correct?
  2. jcsd
  3. Jan 25, 2016 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
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