Chapter 7 Flashcards
(9 cards)
1
Q
ALARA
A
as low as reasonably achievable
2
Q
Cavitation
A
production and dynamics of bubbles in sound
3
Q
Hydrophone
A
a small transducer element mounted on the end of a narrow tube
4
Q
Mechanical index
A
an indicator of nonthermal mechanism activity
5
Q
phantom
A
tissue-equivalent device that has characteristic that are representative of tissue
6
Q
polyvinylidene fluoride
A
a piezoelectic thin film viscosity
7
Q
radiation force
A
the force exerted by a sound beam on an absorber or a reflector
8
Q
test object
A
a device without tissue like properties that is designed to measure some characteristic of an imaging system
9
Q
thermal index
A
an indicator of thermal mechanism activity; a value equal to transducer acoustic output power divided by the estimated power required to raise tissue temperature
