Question

In ultrasound imaging, how long does it take from emitting an ultrasonic signal until its return as an echo from a flat interface between a soft tissue and a muscle, if the thickness of a soft tissue is 2.5 cm, and the speed of sound in soft tissue is 1450 m/s?

(a) 17.2 ms

(b) 34.5 ms

(c) 1.72 ms

(d) 0.0345

Answer 1