Chapter 7 Flashcards Preview

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Flashcards in Chapter 7 Deck (9)
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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