When PRF increases, PRP ______.

When PRF increases, PRP ______.

• A. Decreases
• B. Increases
• C. Remains the same
• D. Doubles

Answer: (A)

PRF and PRP are reciprocal timing quantities in ultrasound. PRF is how many pulses are emitted each second, while PRP is the time between pulses. Because PRP = 1 / PRF, increasing PRF makes the interval between pulses shorter, so PRP decreases. For example, doubling PRF from 5 kHz to 10 kHz halves PRP from 0.0002 s to 0.0001 s. This inverse relationship explains why PRP decreases as PRF increases. Higher PRF improves temporal resolution but reduces maximum imaging depth due to range ambiguity, while lower PRF allows deeper imaging but with slower temporal sampling.

PRF and PRP are reciprocal timing quantities in ultrasound. PRF is how many pulses are emitted each second, while PRP is the time between pulses. Because PRP = 1 / PRF, increasing PRF makes the interval between pulses shorter, so PRP decreases. For example, doubling PRF from 5 kHz to 10 kHz halves PRP from 0.0002 s to 0.0001 s. This inverse relationship explains why PRP decreases as PRF increases. Higher PRF improves temporal resolution but reduces maximum imaging depth due to range ambiguity, while lower PRF allows deeper imaging but with slower temporal sampling.