Question

You are scanning at a depth of 5 cm using a 3 MHz transducer and switch to a 5 MHz transducer without changing the depth setting. Which transducer has the greatest pulse repetition frequency?

Answer 1

The pulse repetition frequency remains the same when switching from a 3 MHz to a 5 MHz transducer if the depth setting is unchanged since PRF is determined by the imaging depth, not by the frequency of the transducer.

Step-by-step explanation:

When switching from a 3 MHz transducer to a 5 MHz transducer, while maintaining the same depth setting of 5 cm, the Pulse Repetition Frequency (PRF) will remain unchanged for both transducers. This is because PRF is determined by the imaging depth, not the frequency of the transducer. The depth setting defines how often the pulses can be sent without overlapping the echoes from a previous pulse, so using a higher frequency transducer does not affect PRF when the depth remains constant.