What is a common term for the Doppler control that sets the maximum detectable velocity?

What is a common term for the Doppler control that sets the maximum detectable velocity?

• A. Velocity range
• B. Flow rate
• C. PRF
• D. Velocity scale

Answer: (D)

Velocity scale is the Doppler control that sets the display range for velocities, i.e., the maximum velocity shown. By adjusting it, you determine how fast flows can be visualized on the spectral or color Doppler display. If the scale is set too low, high-velocity signals may alias or clip; if it’s set too high, slower velocities can appear faint or spread out across a wide range, making them harder to interpret. The other terms refer to different ideas (flow rate is volume per time; PRF is the sampling rate that affects aliasing; velocity range is not the standard label for this specific display control). So the commonly used term for this control is velocity scale.

Velocity scale is the Doppler control that sets the display range for velocities, i.e., the maximum velocity shown. By adjusting it, you determine how fast flows can be visualized on the spectral or color Doppler display. If the scale is set too low, high-velocity signals may alias or clip; if it’s set too high, slower velocities can appear faint or spread out across a wide range, making them harder to interpret. The other terms refer to different ideas (flow rate is volume per time; PRF is the sampling rate that affects aliasing; velocity range is not the standard label for this specific display control). So the commonly used term for this control is velocity scale.