In soft tissue, distance traveled is equal to which factor times the round-trip time?

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Multiple Choice

In soft tissue, distance traveled is equal to which factor times the round-trip time?

Explanation:
Distance traveled by the sound in the tissue during the round-trip equals the propagation speed multiplied by the round-trip time. In soft tissue, the propagation speed is about 1540 m/s, so the distance covered in the round trip is 1540 m/s × round-trip time. For example, a round-trip time of 13 microseconds yields roughly 0.020 m, or 2 cm, traveled during that round trip (the one-way depth to the reflector would be about 1 cm). Wavelength, period, and PRF do not describe how far the wave travels in a given time—their meanings are different (wavelength = speed/frequency, period = 1/frequency, PRF = pulses per second).

Distance traveled by the sound in the tissue during the round-trip equals the propagation speed multiplied by the round-trip time. In soft tissue, the propagation speed is about 1540 m/s, so the distance covered in the round trip is 1540 m/s × round-trip time. For example, a round-trip time of 13 microseconds yields roughly 0.020 m, or 2 cm, traveled during that round trip (the one-way depth to the reflector would be about 1 cm). Wavelength, period, and PRF do not describe how far the wave travels in a given time—their meanings are different (wavelength = speed/frequency, period = 1/frequency, PRF = pulses per second).

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