physics

1

100

If the frequency of sound is above 20 kHz, what is it called

ultrasound

200

transmission with a bend

refraction

300

Ultrasound wave propagation causes displacement of particles in a medium. What are the regions of greatest particle concentration called

compression

400

what is subdicing?

dividing normal crystal elements into smaller elements

500

If the amplitude is doubled, the intensity is

increased by 4 times

intensity equivalent to amplitude²

2

100

What causes enhancement?

weakly attenuating structures

200

When bubbles DONT burst (cavitation type)

stable

300

When bubbles burst (cavitation type)

transient

400

A calculated number related to the likelihood of harmful bioeffects from CAVITATION

MI mechanical index

500

The MATCHING LAYER thickness is ______ the wavelength

1/4

the PZT thickness is 1/2 the wavelength

3

100

What does ALARA stand for?

As low as reasonably achievable 

200

The far zone is AKA

the Fraunhaufer zone

300

The highest output power is used during ______ Doppler

Pulsed

400

Axial resolution is determined by 

SPL

500

The near zone is AKA the

Fresnel zone

4

100

What does B mode Stand for?

brightness mode

200

What does M mode Stand for?

Motion mode

300

What does A mode Stand for?

Amplitude mode

400

Lateral resolution is approx equal to

beam diameter

500

axial resolution is approx equal to

1/2 the SPL