Which One of the Following Statements About Doppler Is False

Multiple Choice

Which one of the following statements about Doppler is false?

A) The best quality Doppler signals are obtained when the sample volume is parallel to the direction of flow.
B) The key is to produce a spectral signal to show a well-defined velocity envelope along with a clear window.
C) Displaying an electrocardiogram (ECG) on the Doppler tracing is not necessary.
D) Flow toward the transducer is above the baseline.