The Computed Tomography (CT) quiz has been developed to test your knowledge of different techniques and procedures used in the CT Scan. This exam is conducted by the American Registry of Radiologic Technologists (AART). Take this quiz to test your knowledge and learn about new topics. Read the questions carefully and answer.
Bowtie filter between the beam and patient
Conversion between attenuation and Hounsfield units
Conversion between fan-beam and parallel geometry
Fix for the blurring inherent to backprojection
Trade-off between image sharpness and noise
Different window levels in CT images
Different patient dose
Different reconstructed field of view (FOV)
A plane through the body perpendicular to the scan axis
A plane through the body oblique to the scan axis
A reconstruction made from projections at neighboring scan axis positions
None
Table movement in 360 degrees / beam width
Patient dose in 360 degrees / beam width
Reconstructed slice thickness / beam width
Gantry angle with respect to the scan axis
Very small findings (e.g. nondisplaced fracture)
Gated cardiac CT
Accurate multiplanar reconstructions
Fast scans
Dose
CT Dose Index (CTDI)
Pitch
Dose-length product (DLP)
Effective mAs
X-ray penetration improves
Tissue contrast improves
Scan times are reduced
Metal streak artifacts are improved
To generate images of similar noise in different patient sizes
To scan patients of different sizes with the same kV and mAs settings
To obtain pretty, low-noise images
To eliminate the radiation risks from CT examinations
CT can be rapidly performed
It is always possible to distinguish between old and new infarcts
CT allows easy exclusion of hemorrhage.
CT allows the assessment of prenchymal damage
CT is the imaging modality of choice for the detecting subarachnoid hemorrhage
Small subarachnoid bleeds may be inapparent.
On CT, subarachnoid hemorrhage appears as high density within sulci and CSF cisterns.
CT becomes more sensitive days to weeks after the acute phase of a subarachnoid hemorrhage.
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