How is pulse repetition frequency (PRF) defined?

Pulse repetition frequency (PRF) is defined as the number of transmission-receive cycles that occur per second in ultrasound imaging. This concept is crucial in ultrasound technology because it directly impacts how quickly data can be acquired and how well moving structures can be evaluated. A higher PRF allows for better visualization of fast-moving structures and improves the detection of smaller or rapidly changing anatomical features.

In practical terms, each pulse of ultrasound sent into the body generates echoes that return to the transducer, and the cycles are critical for creating images from reflected sound waves. Understanding PRF is essential for optimizing ultrasound settings to achieve the best possible image quality and diagnostic information.