Use appropriate duplex instrumentation with appropriate frequencies for the vessels being examined:

• Typically, a linear 5-7 MHz transducer
  • Superficial structures may require a higher frequency transducer
  • Deeper structures or edematous tissue may require a lower frequency transducer
  • Aorto-iliac imaging requires a lower frequency 2-5 MHz curvilinear or phased array transducer
• Display of two-dimensional structure and motion in real-time
  • Doppler ultrasonic signal documentation
  • Spectral analysis with color and/or power Doppler imaging
• Digital storage of static images and/or cineloop is required