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CT Board Review - Body CT. The Essentials Questions and Answers 2024
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CT Board Review - Body CT. The Essentials
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CT Board Review - Body CT. TheEssentials
Computed tomography (CT) is at the heart of every modern radiology department
because of its:
1. speed
2. reliability
3. ability to separate overlapping structures - answer1, 2, & 3
The primary interaction with the anode is excitation resulting in ___ radiation. - answer
Infrared (heat)
T/F:
X-rays pass through the patient interacting with tissue by absorption or scattering, which
results in a measured attenuation of the incident beam. - answer True
Once the data has been acquired, the CT gantry rotation ___ and the computer renders
the raw projection data as an image set. - answerDecelerates
A sharpening kernel is commonly referred to as a ___ kernel used to accentuate fine
pulmonary or osseous detail, but simultaneously increases noise. - answerBone
Numerous formats are available to store images, including: - answera. JPEG
b. GIF
c. PNG
Hodgkin lymphoma accounts for the majority of ___ lymphomas. - answerThymic
Carcinoid tumors arising in the thymus tend to be far more aggressive than their
pulmonary counterparts, primarily as a result of high rates of local reoccurrence and: -
answerMetastasis
Ectopic parathyroid tissue is a __ cause of anterior mediastinal mass. - answerRare
The middle mediastinum is located between the anterior and posterior compartments
and contains the:
1. heart
2. pericardium
3. trachea - answer1, 2, & 3
___ are the most common tumors of the peripheral nerves. - answerSchwannomas
, Because many pulmonary structures and abnormal findings are smaller than __mm,
imaging of the chest is preferably performed using high resolution CT (HRCT)
technique. - answer3
Lung __ is defined as increased attenuation of the lung that obscures the underlying
architecture. - answerConsolidation
The incidence of PJP has diminished because of widespread prophylaxis in the United
States and improved treatment for ___ treatment. - answerHIV
___, defined by irregular intralobular lines, nearly always indicates pulmonary fibrosis. -
answerReticulation
___ cancer remains the leading cause of cancer related death among men and women.
- answerLung
Lung carcinoma is traditionally divided into __ lung carcinomas and __ lung carcinoma
based on histopathology, and this division along with stage direct therapy. -
answersmall cell; non-small cell
Calcification is present in about __ % of pulmonary artery sarcomas. - answer25%
The ease with which these studies can be performed provides the potential for __ and
__ radiation exposure. - answeroveruse; inappropriate
CT can deposit more radiation dose per examination than other imaging modalities and
accounts for ___% of the total collective medical effective dose delivered to the U.S.
public - answer50
The effects of radiation exposure in CT generally fall within one of two categories; ___
and ___. - answerstochastic; deterministic
___ the absorbed dose by the radiation weighting factor leads to the equivalent dose, in
units of Sievert. - answerMultiplying
Both CTDI and DLP are calculated from exposure measurements within a cylindrical
polymathy methacrylate (PMMA): - answerPhantom
T/F:
The way a CT scan is executed can directly impact the dose deposited into the patient. -
answerTrue
The penumbra or area of __ is needed to ensure portion of the fan beam covering the
detector rows is homogenous. - answerUnderbeaming
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