US Flashcards
what is US?
imaging modality using high frequency sound waves
How does US work?
when using doppler what do you need to know?
BART
blue - away
red - towards
what does bone look like?
white periosteum and black bone
artery on US
pulsatile doesnt usually change size very round
vein on US
non pulsatile compressible thinner wall
nerves on US
circular or oval speckled interior
what is acoustic shadowing?
when an acoustically opaque structure (eg bone, heavily calcified vessel) is in the line of the ultrasound beam, a dark shadow appears behind/deep to it
what is post cystic enhancement
inappropriately bright area behind/deep to a fluid filled structure (eg large blood vessel, cyst)
what is reverberation?
commonly occurs where there is a strongly reflecting interface close to and parallel to the transducer, often a needle, vessel wall or muscle fascia
fluid will be (what colour)
black
air will be (what colour)~
sparkles and cant see anything at all
