Ultrasound Flashcards
1
Q
how does ultrasound work
A
electric field appliedd to piezoelectric crystal in the transducer causing it to vibrate and generating ultrasound waves
2
Q
reaction of sound waves to change in tissue type/density
A
transmission
reflection
3
Q
how is depth calculated
A
time taken for ultrasound waves to return
4
Q
high frequency USS waves are used to examine?
A
superficial structures as shorter wavelength so good image resolution but less depth penetration
5
Q
doppler effect?
A
frequency of trasmitted sound is altered as it is reflected from a moving object (eg: when examining flow of blood)
6
Q
BART
A
blue away
red towards
