Continuous Wave Doppler CW

From Ask Dr Wiki

• Continuous generation of ultrasound waves coupled with continuous reception Two crystal transducer with dual function: one crystal devoted to generation, one for receiving

• Measures all velocities along transducer beam

• Density of signal can be compared to forward flow

• Shape of flow curve gives information about pressure gradient across the valve

• Advantage: ability to measure high blood flow velocities accurately

• Disadvantage: lack of selectivity or depth discrimination