Which statement describes the relationship between PRF and depth of view?

Which statement describes the relationship between PRF and depth of view?

• A. PRF increases with depth of view
• B. PRF is unrelated to depth of view
• C. PRF decreases as depth of view increases
• D. PRF and depth of view are inversely related

Answer: (D)

Pulse Repetition Frequency is how many ultrasound pulses the machine can emit per second, and it’s limited by how long echoes take to return from the deepest point you’re imaging. When you look deeper, the sound must travel farther and back, which takes more time. To avoid missing the deepest echoes and to prevent range ambiguity, the system must slow down the pulse rate. That means the maximum PRF decreases as depth increases, and conversely, PRF is higher when imaging shallower depths. So PRF and depth of view are inversely related.

Pulse Repetition Frequency is how many ultrasound pulses the machine can emit per second, and it’s limited by how long echoes take to return from the deepest point you’re imaging. When you look deeper, the sound must travel farther and back, which takes more time. To avoid missing the deepest echoes and to prevent range ambiguity, the system must slow down the pulse rate. That means the maximum PRF decreases as depth increases, and conversely, PRF is higher when imaging shallower depths. So PRF and depth of view are inversely related.