Question

The frequency used in U/S imaging must be greater than which minimum threshold?

A. 1 kHz
B. 10kHz
C. 20 kHz
D. 40 MHz

Answer 1

The frequency used in U/S imaging must be greater than 20 kHz.

Step-by-step explanation:

The frequency used in ultrasound (U/S) imaging must be greater than 20 kHz, which is option C.

Ultrasound frequencies are much higher than the highest frequency that humans can hear, which is typically up to 20,000 Hz.

Ultrasound is used for noninvasive medical diagnoses, such as observing a fetus in the womb.