When depth of view is set to 7.7 cm, PRF is ______.

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Sharpen your skills for the Davies Publishing SPI Test with targeted flashcards and multiple-choice questions, complete with hints and clarifications. Prepare thoroughly for success!

Multiple Choice

When depth of view is set to 7.7 cm, PRF is ______.

Explanation:
Pulse repetition frequency is set by how long it takes for a sound pulse to travel to the deepest point you’re imaging and back. The round-trip time is t = 2d / c, so PRF = 1 / t = c / (2d). With a depth of view of 7.7 cm (0.077 m) and the speed of sound in tissue about 1540 m/s, PRF ≈ 1540 / (2 × 0.077) = 1540 / 0.154 ≈ 10,000 Hz. So the PRF is about 10 kHz. (Using a different sound speed changes the value slightly, but 1540 m/s is the common assumption.)

Pulse repetition frequency is set by how long it takes for a sound pulse to travel to the deepest point you’re imaging and back. The round-trip time is t = 2d / c, so PRF = 1 / t = c / (2d). With a depth of view of 7.7 cm (0.077 m) and the speed of sound in tissue about 1540 m/s, PRF ≈ 1540 / (2 × 0.077) = 1540 / 0.154 ≈ 10,000 Hz. So the PRF is about 10 kHz. (Using a different sound speed changes the value slightly, but 1540 m/s is the common assumption.)

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