2
DAVIES PHYSICS QUESTIONS WITH ACCURATE DETAILED || || || || || ||
ANSWERS
During a sonographic examination of a large vessel, a 45 degree beam-to-vessel angle would
|| || || || || || || || || || || || || ||
be called:
||
A: Normal incidence
|| || ||
***B: Oblique incidence
|| || ||
C: Perpendicular incidence
|| || ||
D: Snell's incidence
|| ||
E: None of the above
|| || || ||
Which sound beam frequency would exhibit the greatest intensity loss with increasing
|| || || || || || || || || || || ||
depth?
****A: 10MHz || ||
B: 8 MHz
|| || ||
C: 5 MHz
|| || ||
D: 3 MHz
|| || ||
E: 2 MHz
|| ||
According to Snell's law, the angle of transmission is related to the incident beam angle and:
|| || || || || || || || || || || || || || ||
A: The amount of acoustic impedance mismatch at an interface.
|| || || || || || || || || ||
B: The change in frequency that occurs at an interface.
|| || || || || || || || || ||
C: One-half of the angle of incidence.
|| || || || || ||
***D: The relative speeds of sound in the two media.
|| || || || || || || || || ||
E: The percentage of diffraction distal to the interface.
|| || || || || || || ||
Ultrasound propagation velocity depends on: || || || ||
A: Amplitude and frequency
|| || || ||
B: Impedance and attenuation
|| || ||
,2
***C: Density and compressibility
|| || || ||
D: Dynamic range and compression
|| || || || ||
E: Impedance and density
|| || ||
while performing a doppler ultrasound examination, you adjust the pulse repetition
|| || || || || || || || || || ||
frequency to 12 kHz. this can also be expressed as:
|| || || || || || || || ||
12,000 kHz ||
which of the following factors does NOT affect impedance?
|| || || || || || || ||
-- stiffness
||
-- density
||
-- propagation speed
|| ||
***-- frequency
|| ||
-- all of the above
|| || || ||
During a diagnostic ultrasound examination, you encounter all of the interactions of
|| || || || || || || || || || || ||
ultrasound and tissue listed below. Which one will NOT cause a redirection of part of the
|| || || || || || || || || || || || || || || ||
ultrasound energy? ||
A: Reflection
||
B: Scattering
|| ||
C: Divergence
|| ||
****D: Absorption ||
E: Refraction
||
during the performance of a sonographic examination, you would be most likely to
|| || || || || || || || || || || || ||
encounter refraction in this view: || || || ||
curved interface ||
(best answer; second best was specular reflector)
|| || || || || ||
Interference patterns of reflected waves causes: || || || || ||
***A: Acoustic speckle
|| || ||
,2
B: Acoustic enhancement
|| || ||
C: Rarefaction
|| ||
D: Volume averaging
|| || ||
E: All of the above
|| || || ||
which of the following increases as frequency increases?
|| || || || || || ||
-- absorption
|| ||
-- scattering
|| ||
-- attenuation
|| ||
--A and C onlu
|| || ||
***-- all of the above
|| || || || ||
What sound parameter is determined only by the medium?
|| || || || || || || ||
A: Frequency
|| ||
B: Period
||
C: Intensity
||
***D: Propagation speed|| || ||
E: None of the above
|| || || ||
which of the following is an example of Rayleigh scatterer?
|| || || || || || || || ||
red blood cell
|| ||
which of the following human tissues has the highest rate of attenuation of an ultrasound
|| || || || || || || || || || || || || || ||
wave?
-- liver
||
-- fat
||
--fluid
***--lung
--blood vessels ||
, 2
while performing a sonographic exam, you encounter the following interfaces. which will
|| || || || || || || || || || || ||
produce the weakest reflected signal? || || || ||
-- organ parenchyma/ fluid
|| || ||
--organ parenchyma/ air || ||
***--organ parenchyma/ organ parenchyma || || || ||
-- organ parenchyma/ bone
|| || ||
-- organ parenchyma/ ligament
|| || || ||
You are imaging a structure containing two media having the same acoustic impedance.
|| || || || || || || || || || || || ||
What will occur at the boundary of the two structures?
|| || || || || || || || ||
***A: All of the sound will be transmitted.
|| || || || || || ||
B: All of the sound will be reflected.
|| || || || || || ||
C: Some of the sound will be refracted.
|| || || || || || || ||
D: Some of the sound will be reflected and some of the sound will be transmitted.
|| || || || || || || || || || || || || || ||
E: Most of the sound will be absorbed at the media boundary.
|| || || || || || || || || || ||
what system control should you adjust to compensate for sound attenuation with increasing
|| || || || || || || || || || || ||
depth?
||
TGC
In order to display a structure on your sonographic image the sound beam must be reflected
|| || || || || || || || || || || || || || ||
at the interface. What is required for sound reflection at the interface of two structures?
|| || || || || || || || || || || || || || ||
A: Oblique incidence at the interface boundary.
|| || || || || || ||
B: Temperature differences between the two media.
|| || || || || || ||
***C: A difference in the acoustic impedance of the media.
|| || || || || || || || || ||
D: Different media diameters.
|| || || ||
E: Different attenuation coefficients.
|| || ||
What interaction of ultrasound and tissue is primarily responsible for imaging the internal
|| || || || || || || || || || || || ||
structure of organs? || ||
A: Specular reflection
|| ||
DAVIES PHYSICS QUESTIONS WITH ACCURATE DETAILED || || || || || ||
ANSWERS
During a sonographic examination of a large vessel, a 45 degree beam-to-vessel angle would
|| || || || || || || || || || || || || ||
be called:
||
A: Normal incidence
|| || ||
***B: Oblique incidence
|| || ||
C: Perpendicular incidence
|| || ||
D: Snell's incidence
|| ||
E: None of the above
|| || || ||
Which sound beam frequency would exhibit the greatest intensity loss with increasing
|| || || || || || || || || || || ||
depth?
****A: 10MHz || ||
B: 8 MHz
|| || ||
C: 5 MHz
|| || ||
D: 3 MHz
|| || ||
E: 2 MHz
|| ||
According to Snell's law, the angle of transmission is related to the incident beam angle and:
|| || || || || || || || || || || || || || ||
A: The amount of acoustic impedance mismatch at an interface.
|| || || || || || || || || ||
B: The change in frequency that occurs at an interface.
|| || || || || || || || || ||
C: One-half of the angle of incidence.
|| || || || || ||
***D: The relative speeds of sound in the two media.
|| || || || || || || || || ||
E: The percentage of diffraction distal to the interface.
|| || || || || || || ||
Ultrasound propagation velocity depends on: || || || ||
A: Amplitude and frequency
|| || || ||
B: Impedance and attenuation
|| || ||
,2
***C: Density and compressibility
|| || || ||
D: Dynamic range and compression
|| || || || ||
E: Impedance and density
|| || ||
while performing a doppler ultrasound examination, you adjust the pulse repetition
|| || || || || || || || || || ||
frequency to 12 kHz. this can also be expressed as:
|| || || || || || || || ||
12,000 kHz ||
which of the following factors does NOT affect impedance?
|| || || || || || || ||
-- stiffness
||
-- density
||
-- propagation speed
|| ||
***-- frequency
|| ||
-- all of the above
|| || || ||
During a diagnostic ultrasound examination, you encounter all of the interactions of
|| || || || || || || || || || || ||
ultrasound and tissue listed below. Which one will NOT cause a redirection of part of the
|| || || || || || || || || || || || || || || ||
ultrasound energy? ||
A: Reflection
||
B: Scattering
|| ||
C: Divergence
|| ||
****D: Absorption ||
E: Refraction
||
during the performance of a sonographic examination, you would be most likely to
|| || || || || || || || || || || || ||
encounter refraction in this view: || || || ||
curved interface ||
(best answer; second best was specular reflector)
|| || || || || ||
Interference patterns of reflected waves causes: || || || || ||
***A: Acoustic speckle
|| || ||
,2
B: Acoustic enhancement
|| || ||
C: Rarefaction
|| ||
D: Volume averaging
|| || ||
E: All of the above
|| || || ||
which of the following increases as frequency increases?
|| || || || || || ||
-- absorption
|| ||
-- scattering
|| ||
-- attenuation
|| ||
--A and C onlu
|| || ||
***-- all of the above
|| || || || ||
What sound parameter is determined only by the medium?
|| || || || || || || ||
A: Frequency
|| ||
B: Period
||
C: Intensity
||
***D: Propagation speed|| || ||
E: None of the above
|| || || ||
which of the following is an example of Rayleigh scatterer?
|| || || || || || || || ||
red blood cell
|| ||
which of the following human tissues has the highest rate of attenuation of an ultrasound
|| || || || || || || || || || || || || || ||
wave?
-- liver
||
-- fat
||
--fluid
***--lung
--blood vessels ||
, 2
while performing a sonographic exam, you encounter the following interfaces. which will
|| || || || || || || || || || || ||
produce the weakest reflected signal? || || || ||
-- organ parenchyma/ fluid
|| || ||
--organ parenchyma/ air || ||
***--organ parenchyma/ organ parenchyma || || || ||
-- organ parenchyma/ bone
|| || ||
-- organ parenchyma/ ligament
|| || || ||
You are imaging a structure containing two media having the same acoustic impedance.
|| || || || || || || || || || || || ||
What will occur at the boundary of the two structures?
|| || || || || || || || ||
***A: All of the sound will be transmitted.
|| || || || || || ||
B: All of the sound will be reflected.
|| || || || || || ||
C: Some of the sound will be refracted.
|| || || || || || || ||
D: Some of the sound will be reflected and some of the sound will be transmitted.
|| || || || || || || || || || || || || || ||
E: Most of the sound will be absorbed at the media boundary.
|| || || || || || || || || || ||
what system control should you adjust to compensate for sound attenuation with increasing
|| || || || || || || || || || || ||
depth?
||
TGC
In order to display a structure on your sonographic image the sound beam must be reflected
|| || || || || || || || || || || || || || ||
at the interface. What is required for sound reflection at the interface of two structures?
|| || || || || || || || || || || || || || ||
A: Oblique incidence at the interface boundary.
|| || || || || || ||
B: Temperature differences between the two media.
|| || || || || || ||
***C: A difference in the acoustic impedance of the media.
|| || || || || || || || || ||
D: Different media diameters.
|| || || ||
E: Different attenuation coefficients.
|| || ||
What interaction of ultrasound and tissue is primarily responsible for imaging the internal
|| || || || || || || || || || || || ||
structure of organs? || ||
A: Specular reflection
|| ||
