Midterm study guide (Gunter)

What is the greatest intensity measured in the US beam?

• SATA

• SPTA

• SPTP

• SATP

The range of frequencies produced by a transducer is:

• operating frequency

• bandwidth

• range

• wavelength

Which is preferable?

• narrow bandwidth

• wide bandwidth

• bandwidth doesn't matter

A ratio of transducer sensitivity is:

• quality factor

• acoustic parameters

• wavelenths

• pulse repetition frequency

High Q transducers are:

• not very sensitive

• very sensitive

What happens to a perpendicular beam at an interface of 2 different media?

• the beam will reflect off the interface at an oblique angle

• the beam will refract

• the beam will transmit through the interface towards the normal line

• the reflection and transmission occur in a straight line

If medium 2 has a higher propagation speed, what happens to an oblique beam?

• it transmits in a straight line

• it refracts away from the normal

• it refracts towards the normal

What determines transducer frequency?

• the voltage from the machine

• it is set by the manufacturer

• the sonographer determines the frequency

• in pulse wave, the PZT thickness

  in continuous wave, the voltage

At what temperature does PZT become depolarized?

• Corie Point

• Huygen's Point

• Snell's Point

• Curie Point

What reduces the SPL (the ringing)?

• the PZT thickness

• the damping layer

• changing the depth

• the sonographer