CT REGISTRY REVIEW 2024/25 UPDATE |QUESTIONS WITH CORRECT ANSWERS A+ GRADED

CT REGISTRY REVIEW 2024/25 UPDATE |
QUESTIONS WITH CORRECT ANSWERS A+
GRADED



A _______ is a benign, highly vascular mass commonly found in
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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
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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
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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.
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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
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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?
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ANS: Pixels with values between -250 HU and +250 HU will
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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
R R R R R R R R R R R R


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
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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
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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
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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
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arterial vessel during contraction of the heart.
R R R R R R R




A primary responsibility of computed tomography in combined
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PET-CT is to:
R ANS: Provide precise anatomic location of
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tumor activity.
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A region of interest (ROI) measurement placed over a portion of a
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CT image provides what type of number?
R R R ANS: Average R R R R RRRRRRRRRR RRR


CT Number (HU-Hounsfield Units)
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A scintillation detector has a higher capture efficiency than?
R R R R R R R R RRRRRRRRR


ANS: A gas ionization chamber
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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
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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
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require the intravenous injection of an iodinated contrast agent
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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
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administration of iodinated contrast media include:
R ANS:R R R R R RRRRRRRRRR RR


Reduction in required contrast agent dose, reduction in the
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incidence of contrast-induced nephrotoxicity (CIN) and reduction
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of streaking artifacts from dense contrast agents in the
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vasculature.
R




After initiation of rapid bolus administration of an iodinated
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contrast agent, he portal venous phase of hepatic contrast
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enhancement occurs at approximately:
R ANS: 60-70
R R R RRRRRRRRRR RRR


seconds.
R