1
If the frequency of sound is above 20 kHz, what is it called
ultrasound
What causes enhancement?
weakly attenuating structures
What does ALARA stand for?
As low as reasonably achievable
What does B mode Stand for?
brightness mode
transmission with a bend
refraction
When bubbles DONT burst (cavitation type)
stable
The far zone is AKA
the Fraunhaufer zone
What does M mode Stand for?
Motion mode
Ultrasound wave propagation causes displacement of particles in a medium. What are the regions of greatest particle concentration called
compression
When bubbles burst (cavitation type)
transient
The highest output power is used during ______ Doppler
Pulsed
What does A mode Stand for?
Amplitude mode
what is subdicing?
dividing normal crystal elements into smaller elements
A calculated number related to the likelihood of harmful bioeffects from CAVITATION
MI mechanical index
Axial resolution is determined by
SPL
Lateral resolution is approx equal to
beam diameter
If the amplitude is doubled, the intensity is
increased by 4 times
intensity equivalent to amplitude2
The MATCHING LAYER thickness is ______ the wavelength
1/4
the PZT thickness is 1/2 the wavelength
The near zone is AKA the
Fresnel zone
axial resolution is approx equal to
1/2 the SPL