Radiology Flashcards
Ultrasound is a technique that uses ___ frequency ____ waves to generate a _____
high
sound
sonogram
The transducer of an ultrasound probe generates ultrasound waves, when the waves meet a change in tissue type/density some waves are _____ and generate an image
reflected
The time is takes for ultrasound waves to return to the probe is used to calculate ____
depth
Higher frequency ultrasound waves have a ____ wavelength, so produce a _____ image resolution, and are best at viewing ____ structures
Higher frequency ultrasound waves have a SHORTER wavelength, so produce a BETTER image resolution, and are best at viewing SUPERFICIAL structures
“The frequency of sound transmitter varies if the object it is reflected from is moving” describes ____
Doppler effect
How do you differentiate arteries and veins on ultrasound?
veins compress if pressure applied and are non-pulsatile
What colour are arteries and veins on US?
black in the middle (anechoic)
What colour is the periosteum of bone on US?
white
What colour is the centre of bone on US?
black
“hypoechoic, may have visible striae or hyperechoic fascia” describes the appearance of what on US?
muscle
“circular or oval, hyperechoic (white) outline & speckled interior, more proximal have hypoechoic interior since contain less connective tissue” describes the appearance of what on US?
nerves
“strongly reflecting interface (eg needle) parallel to transducer” describes the appearance of what on US?
reverberation
What are the most common solid organ traumas?
spleen and liver
What colour does an acute clot appear on CT?
white
What is the management of a query pelvic fracture
pelvic binder until CT
