Which action would decrease color Doppler frame rate?

Which action would decrease color Doppler frame rate?

• A. Decrease frequency
• B. Increase line density
• C. Decrease packet size
• D. Decrease color box size

Answer: (B)

Frame rate in color Doppler imaging is how many color frames per second the system can display. It drops when more data must be captured and processed for each frame. Increasing line density raises the number of scan lines used to construct a single frame, so more data must be acquired, transmitted, and processed. That extra workload takes longer, reducing how quickly frames can be updated. The other options would generally reduce the amount of data per frame—smaller color boxes or smaller data packets—which would allow faster frame updates. Changing the frequency mainly affects depth and resolution rather than directly limiting frame rate.

Frame rate in color Doppler imaging is how many color frames per second the system can display. It drops when more data must be captured and processed for each frame. Increasing line density raises the number of scan lines used to construct a single frame, so more data must be acquired, transmitted, and processed. That extra workload takes longer, reducing how quickly frames can be updated. The other options would generally reduce the amount of data per frame—smaller color boxes or smaller data packets—which would allow faster frame updates. Changing the frequency mainly affects depth and resolution rather than directly limiting frame rate.