Which action would decrease the frame rate?

Which action would decrease the frame rate?

• A. Decreasing Sector Width
• B. Increasing Image Depth
• C. Decreasing Image Depth
• D. Decreasing PRF?

Answer: (B)

Frame rate depends on how long it takes to acquire and reconstruct one frame. When you image deeper, echoes must travel farther and take longer to return from the deepest point, so the time to complete a frame increases and the frame rate drops. That direct, straightforward way to slow down frame rate is to increase image depth. Decreasing sector width reduces the number of scan lines per frame, so the frame takes less time to acquire and the frame rate goes up. Decreasing image depth shortens the travel time of echoes, also increasing the frame rate. Lowering PRF reduces how often pulses are sent, which naturally slows frame rate, but depth is the clearest lever shown here to decrease frame rate.

Frame rate depends on how long it takes to acquire and reconstruct one frame. When you image deeper, echoes must travel farther and take longer to return from the deepest point, so the time to complete a frame increases and the frame rate drops. That direct, straightforward way to slow down frame rate is to increase image depth.

Decreasing sector width reduces the number of scan lines per frame, so the frame takes less time to acquire and the frame rate goes up. Decreasing image depth shortens the travel time of echoes, also increasing the frame rate. Lowering PRF reduces how often pulses are sent, which naturally slows frame rate, but depth is the clearest lever shown here to decrease frame rate.