Question

Which of the following relations are true?

(a) γ increases, penetration of sound increases, resolution decreases

(b) γ increases, penetration of sound decreases, resolution decreases

(c) γ increases, penetration of sound decreases, resolution increases

(d) γ decreases, penetration of sound increases, resolution increases

I had been asked this question in class test.

This question is from Ultrasound topic in section Diagnostic Investigation via Imaging Techniques of Clinical Science

Answer 1

Correct choice is (a) γ increases, penetration of sound increases, resolution decreases

The best I can explain: When the frequency (γ) of the sound waves increases, it gains more energy to overcome the impedance barrier and so is able to penetrate deeper. However, the penetration may not be uniform in all places and reflection may be uneven thus it affects the resolution of the image.