ARDMS (American Registry for Diagnostic Medical Sonography) Practice Test

Disable ads (and more) with a membership for a one time $4.99 payment

Prepare effectively for the ARDMS (American Registry for Diagnostic Medical Sonography) Test with our comprehensive study materials and tips. Master the exam format and content to pass with flying colors!

Practice this question and more.

How deep is a reflector if the go-return time of a sound wave is 39 us?

The correct answer is: 3cm

The correct answer is B. 3cm. The depth of a reflector can be calculated using the formula d = ct/2, where d is the depth, c is the speed of sound in the medium (assumed to be 1,540 m/s in soft tissue), and t is the go-return time of the sound wave. Given that the go-return time is 39 microseconds (or 39 × 10^-6 seconds), and the speed of sound is approximately 1,540 m/s, plugging these values into the formula gives us d = 1,540 × 39 × 10^-6 / 2 = 3cm. Therefore, the reflector is 3cm deep.