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MI Final ultrasound.txt
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common human velocity?
1540 m/s
What contrast do you get if two tissues are highly different?
High contrast
What contrast do you get if two tissues are similar?
low contrast
T/F high frequeny beams are used for deeper structures?
F, low frequency beams used for deeper structures
What is the common frequency for foot and ankle: high or low?
High b/c not very deep structurally
What is the common hertz measurement for Ultrasound sound waves?
25,000 Hz
How does ultrasound convert AC current to sound waves?
Reverse Piezoelectric effect
What is
anisotropy
?
when the entire image is not clear b/c transducer not at 90 degrees
What type of DUS is utilized to view blood flow?
Power doppler
What is
tissue gain compensation
?
mechanism allowing all objects to be struck by same frequency
What is
obtunded
?
bulge of structure appearing on DUS
What is
fibrillar
?
Fibrous structure appearing on DUS
What is the diff b/t hyper- and hypoechoic?
Hyper:
white
Hypoechoic:
black (anechoic)
What is the max amount of fluid that should be in the ankle during an ultrasound?
3mm
how much fluid should be around peroneal sheath?
no more than 3mm
How much fluid shoule be around PT tendon?
no more than 4mm
how much fluid should be around FHL, FDL?
none
how much fluid should be around achilles tendon?
none
how much fluid should be around the retrocalcaneal bursa?
no more than 2-3mm
sizes for medial, central and lateral bands of plantar fascia?
medial
: 3-4mm.
central
: 2-3mm
lateral
: 2
Author
kepling
ID
96701
Card Set
MI Final ultrasound.txt
Description
MI Final ultrasound
Updated
2011-08-10T17:57:41Z
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