Ultrasound 3

Question 1

What is an acoustic shadow image artefact ?

Answer 1

signal voids that appear behind structures that strongly absorb or reflect ultrasonic waves. This can be useful for diagnosing kidney stones

Question 2

What are posterior acoustic enhancement artefacts ?

Answer 2

increased echos deep to structures that absorb sound very well. They can be useful for diagnosing fluid-filled structures such as cysts

Question 3

What are comet tail artefacts?

Answer 3

when small calcific/ crystalline/ highly reflective objects come in contact with the ultrasound wave. They can be useful for diagnosing tiny stones

Question 4

What are twinkling artefacts?

Answer 4

artifacts that appear when sound waves reflect from dense objects, during a doppler scan they come up as rainbow streaks. They can be a indication of abnormalities in blood flow

Question 5

what are mirror artefacts?

Answer 5

when the primary beam reflects from a surface but instead of returning to the transducer it encounters another structure giving a false reading of a deep structure

Question 6

What are reflection artefacts?

Answer 6

ghosting which make it harder to locate structures