What is a major advantage of power Doppler over color flow Doppler?

Power Doppler measures the amplitude (strength) of Doppler signals rather than frequency shift, making it more sensitive to low-velocity and small-vessel blood flow. Its primary advantage is an improved signal-to-noise ratio, allowing for better visualization of slow or weak flow.

A: Power Doppler is more sensitive to motion artifacts, not less.

B: It is still angle dependent, though somewhat less so than color Doppler.

D: Power Doppler does not display flow direction (a limitation).

Reference Extracts:

Kremkau FW. Sonography Principles and Instruments. 9th ed. Elsevier, 2015.

Rumack CM, Wilson SR, Charboneau JW, Levine D. Diagnostic Ultrasound. 5th ed. Elsevier, 2017.