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Principles of Computed Tomography questions with correct answers.
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Principles of Computed Tomography questions with correct answers.
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Principles of Computed Tomographyquestions with correct answers.
Which is the most commonly used beta-blocker for cardiac CT studies? ANS - Metoprolol tartrate
What is the lifetime rate of appendectomy for women if incidental appendectomies are included? ANS -
25%
How many times more common are adrenal masses that are benign cortical adenomas than those that
are primary adrenal cortical carcinomas. ANS - 60 mins
Which is a drawback to using sequential CT scanning for intervention procedures? ANS - The procedure
can be lengthy.
Which is not a reason for increased uptake in the breast? ANS - Menstration
Which describes CABG? ANS - Arteries or veins taken from elsewhere in the patient's body are grafted
from the aorta to the coronary arteries to bypass atherosclerotic narrowings and improve the blood
supply to the coronary circulation supplying the myocardium.
A PET study's sensitivity could be limited if the patient's blood sugar level is more than how many mg/dL
before the injection of FDG? ANS - 200 mg/dL
The SUV of the mediastinal blood pool should be in what range? ANS - 1.5-2
Which helps to reduce artifacts created by respiratory motion? ANS - Using the shortest scan time
possible
,Which of the following statements is true? ANS - In general, higher accumulations of FDG usually
correlate with more aggressive tumors and a greater number of viable tumor cells.
Split-bolus injections divide the contrast media dose into two bolus injections with a delay of how much
time between injections? ANS - 2 to 15 minutes
Which are secreted by the innermost region of the adrenal cortex? ANS - Gonadocorticoids
When does the peak effect of IV-push metoprolol occur? ANS - Between 5 and 10 minutes after
administration
Which heart valve has three folds and is in the right side of the heart, between the right atrium and the
right ventricle? ANS - Tricuspid
After the intravenous (IV) administration of a bolus of contrast material, when does the hepatic arterial
phase typically occur? ANS - 15 to 25 seconds after the contrast bolus
Which may induce uptake in the diaphragm? ANS - Hyperventilation
Abdominal ultrasonography to evaluate right lower quadrant or pelvic pain is particularly suited to
which group? ANS - Children
What is the most common symptom of appendicitis? ANS - Abdominal pain
How are most protocols of the abdomen and pelvis performed? ANS - While the patient lies in a supine
position on the scan table with the arms elevated above the head
Which can most improve the demarcation of the esophagus and the gastroesophageal junction? ANS -
Giving the patient an oral contrast agent
Which is a not a possible shape of the adrenal glands on a cross-sectional image? ANS - C shape
, What is Dunphy's sign of acute appendicitis? ANS - Increased pain in the right lower quadrant with
coughing
How many hours is a patient required to fast before a PET examination? ANS - From 4-6 hours
What percent of urinary calculi is thought to pass spontaneously? ANS - 10-15%
Which is a disadvantage to using MDCT in the diagnosis of pulmonary emboli? ANS - The visualization of
smaller arteries can be affected by problems with technique or suboptimal vessel opacification.
What is the primary complication of all types of biopsy procedures? ANS - Bleeding
Which statement about CT interventional procedures is not true? ANS - Because of radiation dose
concerns, patients are limited to a single position during the procedure.
Which is another name for prospective ECG gating? ANS - Cine-mode scanning
At what age does bowl activity decrease? ANS - 60
What percent of total energy is obtained from the oxidation of fatty acids? ANS - 50-70%
What are the most common interventional procedures? ANS - CT guided biopsies
The overall complication rate for a fine-needle biopsy is approximately what percent? ANS - 2%
Which does not cause asymmetry in the salivary gland during FDG imaging? ANS - Teeth grinding
CT and CT fluoroscopy (CTF) must be used separately and cannot be used in combination. (True or False)
ANS - False
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