If imaging depth is increased, the frame rate generally:

• A. Increases
• B. Decreases
• C. Remains the Same
• D. Becomes Irregular

Answer: (B)

The main idea is that frame rate is tied to how long the system must collect data for each frame. When you image deeper, the echoes or signals you need to capture take longer to return, so the window you have for each acquisition grows. That longer time per frame means you can fit fewer frames into one second, so the frame rate goes down. Deeper imaging also often reduces signal strength due to attenuation, which can require longer data collection or more averaging to maintain image quality, further lowering the frame rate. So, increasing imaging depth generally decreases the frame rate.