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CT REGISTRY REVIEW 2024/25 UPDATE |QUESTIONS WITH CORRECT ANSWERS A+ GRADED
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CT REGISTRY REVIEW 2024/25 UPDATE |QUESTIONS WITH CORRECT ANSWERS A+ GRADED
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CT REGISTRY REVIEW 2024/25 UPDATE |QUESTIONS WITH CORRECT ANSWERS A+
GRADED
A _______ is a benign, highly vascular mass commonly found in
R R R R R R R R R R
the liver.
R R ANS: hemangioma RRRRRRRRRR RRR
A ________ infection is one that a patient acquires during a stay
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in a health care institution.
R R R ANS: Nosocomial
R R RRRRRRRRRR RRR
A 16-slice MSCT system utilizes an adaptive array of 24
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detectors, each ranging in size from 0.625 to 1.25 mm. What is
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the maximum number of sections the system can acquire with
R R R R R R R R R R
each rotation of the gantry?
R R ANS: 16 R R R RRRRRRRRRR RRR
A common site for the IV administration of iodinated contrast
R R R R R R R R R
media is the anterior recess of the elbow, otherwise known as:
R R R R R R R R R R R RRRRR
ANS: antecubital space.
RRRRR RRR R
A complete CT study of the orbits should include:
R R R R R R R R RRRRRRRRRR ANS: RR
2.5 mm x 2.5 mm axial and coronal sections
R R R R R R R R R
A CT angiogram (CTA) of the neck is performed primarily for the
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evaluation of the:
R ANS: carotid arteries. R R RRRRRRRRRR RRR R
,A CT image is displayed in a window with a level of +200 and a
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width of 1000. What are the pixel values?
R R R ANS: Between R R R R R RRRRRRRRRR RRR
-300 HU and +700 HU will be assigned shades of gray
R R R R R R R R R R R
A CT image is displayed in a window with a level of 0 and a
R R R R R R R R R R R R R R
width of 500. Which of the following statements are correct?
R R R R R R R R R R RRRRRRR
ANS: Pixels with values between -250 HU and +250 HU will
RRR RRR R R R R R R R R R
be assigned shades of gray.
R R R R R
A CT image is formed in part by projecting back all of the
R R R R R R R R R R R R
attenuation values recorded during data acquisition onto a:
R R R R R R R R RRRRRRRRR
ANS: matrix.
R RRR
A CT image is formed in part by projecting back all of the
R R R R R R R R R R R R
attenuation values recorded during data acquisition onto a:
R R R R R R R R RRRRRRRRR
ANS: matrix.
R RRR
A CT system measures the average linear attenuation coefficient
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of a voxel of tissue to be 0.008. The linear attenuation coefficient
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of water for this scanner equals 0.181. The CT number assigned
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to the pixel representing this voxel of tissue equals:
R R R R ANS: R R R R R RRRRRRRRRR RR
-956 HU
R R
A first generation CT scanner consists of an x-ray tube and two
R R R R R R R R R R R
detectors that translate across the patient's head while rotating in
R R R R R R R R R R
1 degree increments for a total of:
R R R ANS: 180 degrees. R R R R RRRRRRRRRR RRR R
,A focused, thin-section axial CT acquisition through just the
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region of the vocal cords should extend:
R R R ANS: From just
R R R R RRRRRRRRRR RRR R
above the hyoid bone inferiorly through the cricoid cartilage.
R R R R R R R R R
A normal range for diastolic blood pressure in an adult is?
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ANS: 60-90 mm Hg
R RRR R R
A patient in shock may exhibit which of the following symptoms?
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ANS: Tachycardia, cyanosis, rapid, and shallow breaths.
RRRRRRRRRR RRR R R R R R
A patient's blood pressure is measured as 140/70 mm Hg. The
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number 140 represents?
R R ANS: The pressure within the
R RRRRRRRRRR RRR R R R
arterial vessel during contraction of the heart.
R R R R R R R
A primary responsibility of computed tomography in combined
R R R R R R R
PET-CT is to:
R ANS: Provide precise anatomic location of
R R RRRRRRRRRR RRR R R R R
tumor activity.
R R
A region of interest (ROI) measurement placed over a portion of a
R R R R R R R R R R R
CT image provides what type of number?
R R R ANS: Average R R R R RRRRRRRRRR RRR
CT Number (HU-Hounsfield Units)
R R R R
A scintillation detector has a higher capture efficiency than?
R R R R R R R R RRRRRRRRR
ANS: A gas ionization chamber
R RRR R R R
A standard CT image reconstructed on a 512^2 matrix has a
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digital size of approximately...
R R ANS: 0.5 MB.
R R RRRRRRRRRR RRR R
, A total volume of 125 mls of an iodinated contrast agent is
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administered intravenously via automatic injector in 50 seconds.
R R R R R R R R
The flow rate for this injection is?
R R R ANS: 2.5 mL/sec R R R R RRRRRRRRRR RRR R
A(n) _________ contrast material may be described as one that
R R R R R R R R R
does not dissociate into charged particles in solution.
R R R ANS: R R R R R RRRRRRRRRR
non-ionic
RRR
Abnormalities of the middle and inner ear may be best R R R R R R R R R
demonstrated with CT utilizing _________ sections.
R R R R R R RRRRRRRRRR ANS: R
1-2 mm
RR R
Accurate demonstration of ____________ would most likely
R R R R R R
require the intravenous injection of an iodinated contrast agent
R R R R R R R R R
during a CT study of the chest.
R R R ANS: mediastinal
R R R R RRRRRRRRRR RRR
lymphadenopathy
R
Advantages of a saline flush immediately following the IV
R R R R R R R R
administration of iodinated contrast media include:
R ANS:R R R R R RRRRRRRRRR RR
Reduction in required contrast agent dose, reduction in the
R R R R R R R R R
incidence of contrast-induced nephrotoxicity (CIN) and reduction
R R R R R R R
of streaking artifacts from dense contrast agents in the
R R R R R R R R R
vasculature.
R
After initiation of rapid bolus administration of an iodinated
R R R R R R R R
contrast agent, he portal venous phase of hepatic contrast
R R R R R R R R R
enhancement occurs at approximately:
R ANS: 60-70
R R R RRRRRRRRRR RRR
seconds.
R
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