Utilize appropriate duplex instrumentation with the appropriate frequencies for the vessels being examined.

• Typically, this is a high-frequency linear transducer with frequencies ranging from 8-15 MHz.
• Lower frequencies or a small footprint transducer may be utilized to access the origin of the subclavian arteries in the chest region.
• Display of both two-dimensional structure and motion in real-time
  • Doppler ultrasonic signal documentation
  • Spectral analysis with or without color Doppler imaging
• Digital storage of static images or cineloop is required.