The Arterial Resistivity Index (ARI) is a Doppler ultrasound-derived measurement used in vascular studies to assess the resistance of blood flow within arteries. It is often calculated from the peak systolic velocity (PSV) and end-diastolic velocity (EDV) of blood flow in a specific artery.

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  1. Medical ultrasonography
  2. Medical physics
  3. Applied and interdisciplinary physics
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