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Radiology General 7407001b

What is the mechanism of an acoustic shadow seen on USG?

A
Refraction
B
Reflection
C
Aifacts
D
Obstruction
High-Yield Explanation
An acoustic shadow is an echo free area located behind an insonated structure. It is caused by total reflection of the ultra sound waves causing a shadow behind it. Reference: The Practice of Ultrasound: A Step-by-Step Guide to Abdominal Scanning By Behold Block page 49.
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