CCI: Physics of Ultrasound-URR Exam Questions With Correct Answers.
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Course
URR
Institution
URR
CCI: Physics of Ultrasound-URR Exam
Questions With Correct Answers.
Which of the following adjustments will change the image data that will be stored in the memory
of the ultrasound system?
A) Both pre-processing and post-processing
B) Post-processing
C) Changing monitor contrast settings at ...
CCI: Physics of Ultrasound-URR Exam
Questions With Correct Answers.
Which of the following adjustments will change the image data that will be stored in the memory
of the ultrasound system?
A) Both pre-processing and post-processing
B) Post-processing
C) Changing monitor contrast settings at the beginning of the exam.
D) Pre-Processing - answer✔✔Pre-processing-is performed as the image is "live" or in real time,
before it has been stored to memory.
Which measurement of beam intensity is used to describe levels of intensity associated with US
bioeffects?
A) Spatial peak temporal peak
B) Spatial average temporal peak
C) Spatial average temporal average
D) Spatial peak temporal average - answer✔✔Spatial peak temporal average
Which of the following technical factors can negatively affect the 2D planimetry evaluation of
the mitral valve?
A) Valve masking from mechanical MVR and lateral resolution
B) Transducer with a short spatial pulse length and long wavelength
C) Lateral resolution and gain settings
D) Transducer with a short spatial pulse length and high frequency - answer✔✔Lateral
resolution and gain settings
________________ occurs posterior to highly attenuating structures.
A) Misregistration
B) Refraction
D) Enhancement - answer✔✔Shadowing
If you increase the power output on the machine:
A) Beam intensity and beam penetration increases
B) Beam intensity and the magnitude of the doppler shift increases
C) Beam intensity, resolution and beam penetration increase
D) Beam penetration and the magnitude of the doppler shift increase - answer✔✔Beam intensity
and beam penetration increase
Which of the following will aid in visualization of the endocardium?
A) Increased transducer frequency
B) Larger sector size
C) Increased wall filter
D) Agitated saline contrast - answer✔✔Increased transducer frequency-this will improve spatial
and contrast resolution
All of the following are techniques used to better visualize the LV apex in the apical view,
except?
A) Change to a lower frequency transducer
B) Contrast administration
C) Apply color doppler to the LV chamber
D) Adjust focal zone depth - answer✔✔Change to a lower frequency transducer-a lower
frequency probe will improve penetration but decrease resolution
Which of the following ultrasound techniques has the highest temporal resolution?
A) 3D imaging
B) 2D imaging
C) Color doppler
D) M-Mode - answer✔✔M-Mode
Lateral resolution is defined as:
A) The ability to differentiate two reflectors that are perpendicular to the US beam
B) The ability to differentiate two reflectors that are moving in a direction parallel to the US
beam
C) The ability to differentiate two reflectors that are parallel to the US beam
D) The ability to differentiate two reflectors that are moving in a direction that is perpendicular
to the US beam - answer✔✔The ability to differentiate two reflectors that are parallel to the US
beam
Frequencies used in transthoracic imaging are usually in the range of ____________.
Frequencies used in transesophageal imaging are usually in the range of ______________.
A) 3-6 MHz;6-8 MHz
B) 3-6 MHz; 5-7 MHz
C) 2.5-4 MHz; 5-7 MHz
D) 1-3 MHz; 6-8 MHz - answer✔✔2.5-4 MHz; 5-7 MHz
When does aliasing occur? - answer✔✔When the frequency shift exceeds the PRF of the
transducer
Which of the following system control adjustments will increase the amount of color doppler that
is superimposed over the 2D image?
A) Increased threshold and increased persistence
B) Decrease persistence
C) Increased wall filter
D) Decreased threshold - answer✔✔Increased threshold and increased persistence-Threshold
control=Color priority
While scanning the heart from the apical window, the ventricular chambers are anechoic but
artifactual echoes appear to fill the atria. Which of the following adjustments of the system
controls would best address this issue?
A) Decrease near field gain levels
B) Switch to a higher frequency transducer
C) Increase output power to increase penetration
D) Decrease far field gain - answer✔✔Decrease far field gain-adjusting the power output can
improve the image but it should always be performed after all other image improvement
techniques have been used
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