Which term describes the interval between the start of one transmitted pulse and the start of the next?

Which term describes the interval between the start of one transmitted pulse and the start of the next?

• A. Period
• B. Pulse repetition frequency
• C. Depth gain compensation
• D. Demodulation

Answer: (A)

The interval from the start of one transmitted pulse to the start of the next is the period of the pulse train. In ultrasound, this is the pulse repetition period, the total time elapsed between the onset of one pulse and the onset of the next. It’s the time measure that governs how often pulses are emitted, and it’s the reciprocal of the pulse repetition frequency (PRF): PRP = 1 / PRF. So as the period gets longer, pulses are emitted less often. Other terms don’t describe this interval: pulse repetition frequency measures how many pulses occur per second, depth gain compensation adjusts gain with depth, and demodulation is a processing step to extract the useful signal.

The interval from the start of one transmitted pulse to the start of the next is the period of the pulse train. In ultrasound, this is the pulse repetition period, the total time elapsed between the onset of one pulse and the onset of the next. It’s the time measure that governs how often pulses are emitted, and it’s the reciprocal of the pulse repetition frequency (PRF): PRP = 1 / PRF. So as the period gets longer, pulses are emitted less often.

Other terms don’t describe this interval: pulse repetition frequency measures how many pulses occur per second, depth gain compensation adjusts gain with depth, and demodulation is a processing step to extract the useful signal.