CT exam questions bootcamp
questions and verified answers
what radiation dose quantity is significantly influenced by the overall length of a CT scan? -
correct answer ✔✔ dose length product (DLP)
in what way do Compton scattering interactions affect the image quality of a CT scan? - correct
answer ✔✔ decreased contrast resolution
what liver pathology is commonly observed in CT as multiple hypoattenuating lesions - correct
answer ✔✔ liver mets
what is the primary indication for a CT colonography with volume rendering (VR)? - correct
answer ✔✔ screening for colorectal carcinoma
what CT windowing technique is appropriate for visualizing lung tissue? - correct answer ✔✔
1800 WW and -600 WL
what post processing method in CT is useful for creating images with variable transparency and
colors? - correct answer ✔✔ volume rendering
what is the primary anatomical structure of interest when performing ejection fraction
measurements in CT? - correct answer ✔✔ left ventricle
which of the following exposure settings will produce an xray beam with the highest beam
quantity?
A. 70 kVp 500 mA
, B. 90 kVp 200 mA
C. 110 kVp 400 mA
D 140 kVp 300 mA - correct answer ✔✔ D
which of the following CT detector configurations should be used to minimize total scan time?
A. 64 rows x 0.625mm per row
B. 32 rows x 1.25 mm per row
C. 16 rows x 0.625mm per row
D. 8 rows x 1.25mm per row - correct answer ✔✔ B
what vessel is formed by the fusion of the vertebral arteries at the level of the foramen
magnum? - correct answer ✔✔ basilar artery
a single slice in a series of axial images shows a pattern of parallel streaks across the entire
image. what is the likely cause of the artifact? - correct answer ✔✔ xray tube output was
temporarily lost
what xray beam geometry is used by a cone beam CT scanner? - correct answer ✔✔ 3
dimensional xray beam exposing several detector rows
what reconstruction algorithm decreases image noise at the expense of decreasing spatial
resolution? - correct answer ✔✔ standard algorithm
what data acquisition method is used to perform perfusion imaging of brain parenchyma? -
correct answer ✔✔ shuttle
what is a common cannulation site for angiographic imaging in CT? - correct answer ✔✔ 18
gauge cannula in the proximal basilic vein
questions and verified answers
what radiation dose quantity is significantly influenced by the overall length of a CT scan? -
correct answer ✔✔ dose length product (DLP)
in what way do Compton scattering interactions affect the image quality of a CT scan? - correct
answer ✔✔ decreased contrast resolution
what liver pathology is commonly observed in CT as multiple hypoattenuating lesions - correct
answer ✔✔ liver mets
what is the primary indication for a CT colonography with volume rendering (VR)? - correct
answer ✔✔ screening for colorectal carcinoma
what CT windowing technique is appropriate for visualizing lung tissue? - correct answer ✔✔
1800 WW and -600 WL
what post processing method in CT is useful for creating images with variable transparency and
colors? - correct answer ✔✔ volume rendering
what is the primary anatomical structure of interest when performing ejection fraction
measurements in CT? - correct answer ✔✔ left ventricle
which of the following exposure settings will produce an xray beam with the highest beam
quantity?
A. 70 kVp 500 mA
, B. 90 kVp 200 mA
C. 110 kVp 400 mA
D 140 kVp 300 mA - correct answer ✔✔ D
which of the following CT detector configurations should be used to minimize total scan time?
A. 64 rows x 0.625mm per row
B. 32 rows x 1.25 mm per row
C. 16 rows x 0.625mm per row
D. 8 rows x 1.25mm per row - correct answer ✔✔ B
what vessel is formed by the fusion of the vertebral arteries at the level of the foramen
magnum? - correct answer ✔✔ basilar artery
a single slice in a series of axial images shows a pattern of parallel streaks across the entire
image. what is the likely cause of the artifact? - correct answer ✔✔ xray tube output was
temporarily lost
what xray beam geometry is used by a cone beam CT scanner? - correct answer ✔✔ 3
dimensional xray beam exposing several detector rows
what reconstruction algorithm decreases image noise at the expense of decreasing spatial
resolution? - correct answer ✔✔ standard algorithm
what data acquisition method is used to perform perfusion imaging of brain parenchyma? -
correct answer ✔✔ shuttle
what is a common cannulation site for angiographic imaging in CT? - correct answer ✔✔ 18
gauge cannula in the proximal basilic vein
