DMS Ultrasound Physics I Final Exam Questions With
Complete Solutions
wavelength
The length of one complete cycle of a wave.
specular reflection
Reflection of sound off a smooth surface.
frequency
Cycles per second
perior
Time per cycle
amplitude
maximum variation per cycle
propagation speed
Speed of a sound wave through a medium.
normal incidence
Angle of incidence is 90 degrees to the interface.
Rayleigh scattering
Red blood cells are an example of ______________
_____________.
axial resolution
The resolution of two interfaces that are parallel to each other.
,impedance
density x prop speed= ?
System B
If system A has a wavelength of 5mm for a two-cycle pulse and
system B has a wavelength of 2mm for a two-cycle pulse, which
one is going to provide the best axial resolution?
impedance
The acoustic resistance to sound traveling in a medium.
3dB
If the intensity at point A is 20mW/cm^2 and at point B it is
10mW/cm^2, the attenuation from A to B is ____________ dB.
2.5mW/cm^2
If the intensity at the start of the path is 10mW/cm^2 and the
attenuation over the path is 6dB, the intensity at the end of the
path is ____________ mW/cm^2.
decreases
As a wave travels through a medium, the intensity of the wave
_____________. (increases/decreases/remains the same)
decreases
Destructive interference results in a wave where the amplitude
_________________. (increases/decreases/remains the same)
increases
, If power is doubled and area remains the same, intensity
_______________. (increases/decreases/remains the same)
increases
Propagation speed increases if stiffness _________________.
(increases/decreases/remains the same)
increases
Frequency decreases as period _________________.
(increases/decreases/remains the same)
decreases
As the frequency is increased, pulse duration
___________________. (increases/decreases/remains the same)
decreases
As wavelength increases, frequency __________________.
(increases/decreases/remains the same)
decreases
If the depth is changed from 6cm to 12cm, the pulse repetition
frequency ___________________. (increases/decreases/remains
the same)
8,000,000
How many mm are in 8km?
amplitude
Which of the following is adjustable by the sonographer?
-amplitude
-wavelength
Complete Solutions
wavelength
The length of one complete cycle of a wave.
specular reflection
Reflection of sound off a smooth surface.
frequency
Cycles per second
perior
Time per cycle
amplitude
maximum variation per cycle
propagation speed
Speed of a sound wave through a medium.
normal incidence
Angle of incidence is 90 degrees to the interface.
Rayleigh scattering
Red blood cells are an example of ______________
_____________.
axial resolution
The resolution of two interfaces that are parallel to each other.
,impedance
density x prop speed= ?
System B
If system A has a wavelength of 5mm for a two-cycle pulse and
system B has a wavelength of 2mm for a two-cycle pulse, which
one is going to provide the best axial resolution?
impedance
The acoustic resistance to sound traveling in a medium.
3dB
If the intensity at point A is 20mW/cm^2 and at point B it is
10mW/cm^2, the attenuation from A to B is ____________ dB.
2.5mW/cm^2
If the intensity at the start of the path is 10mW/cm^2 and the
attenuation over the path is 6dB, the intensity at the end of the
path is ____________ mW/cm^2.
decreases
As a wave travels through a medium, the intensity of the wave
_____________. (increases/decreases/remains the same)
decreases
Destructive interference results in a wave where the amplitude
_________________. (increases/decreases/remains the same)
increases
, If power is doubled and area remains the same, intensity
_______________. (increases/decreases/remains the same)
increases
Propagation speed increases if stiffness _________________.
(increases/decreases/remains the same)
increases
Frequency decreases as period _________________.
(increases/decreases/remains the same)
decreases
As the frequency is increased, pulse duration
___________________. (increases/decreases/remains the same)
decreases
As wavelength increases, frequency __________________.
(increases/decreases/remains the same)
decreases
If the depth is changed from 6cm to 12cm, the pulse repetition
frequency ___________________. (increases/decreases/remains
the same)
8,000,000
How many mm are in 8km?
amplitude
Which of the following is adjustable by the sonographer?
-amplitude
-wavelength
