Edelman chapter 8

Pulse length is _____ related to pulse duration.

• directly

• inversely

Q-factor is _____ related to bandwidth.

• directly

• inversely

Pulse duration is _____ related to bandwidth.

• directly

• inversely

The sensitivity of transducers that create short duration pulses is likely to be _____ that of transducers that create long pulses.

• greater than

• less than

• equal to

All of the following correctly describe an imaging transducer except:

• high sensitivity

• low Q

• wide bandwidth

• damped

Shorter duration events (such as dampened pulses) are more likely to be wide bandwidth

• true

• false

What occurs when a PZT crystal's temperature is elevated above the Curie point?

• it becomes polarized

• it becomes depolarized

• nothing happens

The acoustic impedance of the matching layer is approximately the same as the acoustic impedance of skin.

• true

• false

Imaging transducers are usually of high rather than low bandwidth.

• true

• false

A very high Q factor transducer is used more often in diagnostic imaging transducers than a low Q factor.

• true

• false