15. Ultrasound Basics Flashcards
ultrasound wave
sound waves
what is in u/s probe
piezoelectric crystales
linear probe freq
high freq
5-15 MHZ
linear probe beam
rectangular
linear FOV
narrow FOV
linear use
vascular access
nerve blocks
curvilinear freq
lower freq
2-5 MHZ
curvilinear beam
curved
wide
curvilinear FOV
wide FOV
curvilinear use
deep structures
high freq =
better resolution
less penetration
low freq =
less resolution
better penetration
depth is measured in
cm
gain
screen brightness
doppler red
toward probe
doppler blue
away from probe
doppler no color
90 deg from probe
BART
blue
away
red
toward
long axis vessel
band
short axis vessel
circle
in-plane
needle parallel to u/s array
out-of-plane
needle perpendicular to u/s array
in-plane needle insertion
1 cm from side of transverser
out-of-plane needle insertion
next to middle of probe mark
