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URR Abdomen Physics & Clinical exam with complete solutions 2024_2025.
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URR Abdomen Physics & Clinical exam with complete solutions 2024_2025.
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URR Abdomen Physics & Clinical examwith complete solutions 2024/2025
If you have a trapezoidal field of view on a linear array, which resolution are you
degrading? - ANSWER- lateral resolution
- Trapezoidal = 台形
- wider beams = less lateral resolution
If the entire image is too bright, what do you do first? - ANSWER- decrease the
output power
reverberation artifact due to gas production AKA _______ artifact - ANSWER-
resonance artifact
lower frame rate = increased/degraded temporal resolution - ANSWER- degraded
temporal resolution
For renal artery doppler evaluation, the angle should be _____. For
intraparenchymal arteries, the angle should be _____. - ANSWER- - main RA = <60
- intraparenchymal = <20
Increasing _____ will most improve the ability to properly trace the contour of
Doppler waveform. - ANSWER- Sweep speed
A simple cyst could have artifactual debris in it in case of (x2) - ANSWER- - short
distance from the transducer
- volume averaging
A contrast agent that consists of a cellulose suspension can better visualize
which organ? - ANSWER- pancreatic tail
, Which artifact occurs when sampling vessels adjacent to a highly reflective
structure like a bone? - ANSWER- Cross talk
- mirror image of the waveform on the other side of the baseline
What happens if you decrease the color threshold? - ANSWER- reduce the color
displayed
- color threshold AKA priority
- increase threshold if you don't see enough color
Harmonic imaging increase (x3) and decrease (x3) - ANSWER- Increase
- spatial resolution
- contrast resolution
- signal to noise ratio
Decrease
- reverberation
- beam aberration
- side lobes
The number of lines of information used to create the color displayed on the
image is called - ANSWER- Packet size
- increase packet size = increase color display
Sample angle controls the amount of color fill in a vessel evaluated with color
Doppler. T/F - ANSWER- True
- angle DOES matter to color filling
File type for PACS system - ANSWER- DICOM = Digital Imaging &
Communications in Medicine
Name of transducer; order of the term in the name - ANSWER- 1. Shape of the
transducer comes first
2. phased/sequential comes second
e.g.
- sector phased array
- linear sequential array
The bayonet artifact is - ANSWER- a type of propagation speed error, the tip of
the needle appears curved
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