QUESTIONS WITH VERIFIED
ANSWERS.
The wavelength of 3 MHz ultrasound in soft tissue is
________ mm.
Select one:
a.510
b.5.1
c.0.51
d.4.6
c.0.51
Imaging depth increases with increasing frequency.
Select one:
a.True
b.False
b.False
Sound having a frequency of 10,000 Hz or higher is
called ultrasound.
Select one:
a.True
b.False
b.False
The period of an ultrasound machine is determined by the
frequency.
,a.False
b.True
b.True
The average propagation speed in soft tissue is 1.54
mm/µs.
Select one:
a.True
b.False
a.True
Amplitude is the maximum variation that occurs in an
acoustic ________.
Select one:
a.frequency
b.medium
c.variable
d.propagation speed
c.variable
Who discovered the phenomenon that certain crystals
could convert sound to electricity, and electricity to sound
Select one:
Ian McDonald
Christian Doppler
Paul Langevin
Jacques and Pierre Curie
Jacques and Pierre Curie
A cycle is one complete variation in pressure.
Select one:
a.True
b.False
, a.True
Please rank the following in order of fastest to slowest
propagation speed in soft tissue. A. soft tissue B. lung C.
fat D. bone
Select one:
A. soft tissue B. lung C. fat D. bone
D. bone, A. soft tissue, C. fat, B. lung
D. bone, A. soft tissue B. lung C. fat
A. soft tissue, C. fat D. bone, B. lung
D. bone, A. soft tissue, C. fat, B. lung
All of the following are acoustic variables except ________.
Select one:
a.pressure
b.density
c.compression
d.particle vibration
c.compression
In using the term "compression zone", we are referring to
Select one:
a region of high density or pressure
the oscillating frequency of the sound wave
tiny molecular particles
areas of increased sound velocity
a region of high density or pressure
The higher the frequency, the greater the penetration
depth.
Select one: