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CCI: Physics of Ultrasound-URR Questions With Answers Graded A+ Assured Success
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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 - 2.5-4 MHz; 5-7 MHz Which of the follow...

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  • August 25, 2024
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  • 2024/2025
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CCI: Physics of Ultrasound-URR
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 - 2.5-4 MHz; 5-7 MHz



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 - Increased transducer frequency-this will improve spatial and contrast
resolution




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 - 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 - 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 - Lateral resolution and gain
settings



________________ occurs posterior to highly attenuating structures.

A) Misregistration

B) Refraction

C) Shadowing

D) Enhancement - 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 - Beam intensity and beam
penetration increase



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 - 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 - 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 - The ability to differentiate two reflectors that are parallel to the US beam




When does aliasing occur? - 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 - 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

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