Which adjustment would NOT decrease frame rate?

Which adjustment would NOT decrease frame rate?

• A. Increasing the number of transmit focal zones
• B. Increasing scanning depth
• C. Increasing the receiver gain
• D. Increasing scan line density

Answer: (C)

Frame rate is determined by how fast one complete scan cycle can be acquired, which mainly depends on the time needed to listen for echoes from the set depth (the PRP). Increasing the number of transmit focal zones means more focusing steps and transmissions per line, so more time per line and a slower frame rate. Imaging deeper increases the time echoes take to return, lengthening the PRP and lowering frame rate. Scanning with higher line density adds more scan lines per frame, increasing data to acquire and reducing frame rate. In contrast, boosting receiver gain only amplifies signal strength without changing the timing or amount of data collected, so it doesn’t affect frame rate. Therefore, increasing the receiver gain is the adjustment that would not decrease frame rate.

Frame rate is determined by how fast one complete scan cycle can be acquired, which mainly depends on the time needed to listen for echoes from the set depth (the PRP). Increasing the number of transmit focal zones means more focusing steps and transmissions per line, so more time per line and a slower frame rate. Imaging deeper increases the time echoes take to return, lengthening the PRP and lowering frame rate. Scanning with higher line density adds more scan lines per frame, increasing data to acquire and reducing frame rate. In contrast, boosting receiver gain only amplifies signal strength without changing the timing or amount of data collected, so it doesn’t affect frame rate. Therefore, increasing the receiver gain is the adjustment that would not decrease frame rate.