What is dirty shadowing in ultrasound imaging caused by?

Question

Choose only ONE best answer.

A
The interaction between the ultrasound beam and gas within tissues
B
The high degree of reflection and scattering of ultrasound waves at the gas-tissue interface
C
The presence of a highly dense attenuating structure that absorbs sound waves

Answer 1

B
The high degree of reflection and scattering of ultrasound waves at the gas-tissue interface