1.3 Introduction to Doppler Ultrasound

Question 1

Explain the principle of Doppler ultrasound.

Answer 1

Transducer uses the ‘Doppler Effect’ to determine if blood flow is moving towards or away from the probe.

Red = towards probe

Blue = away from probe

Question 2

Explain the principle behind spectral Doppler.

Answer 2

Similar to Doppler ultrasound, but with the added effect of seeing the magnitude of the particular flow.