CT Registry Review Questions and Correct Answers
Iothalamate meglumine - Correct Answer aka Conray; Ionic radiopaque contrast media (RCM)
An average range for activated PTT - Correct Answer 25-35 seconds
Which of the following is the correct angle of insertion for placing a butterfly needle ...
CT Registry Review Questions and Correct
Answers
Iothalamate meglumine - Correct Answer aka Conray; Ionic radiopaque contrast media (RCM)
An average range for activated PTT - Correct Answer 25-35 seconds
Which of the following is the correct angle of insertion for placing a butterfly needle into a vein for
intravenous of a contrast agent - Correct Answer 15 degrees
A total volume of 125mL of an iodinated contrast agent is administered intravenously via automatic
injector in 50 seconds. The flow rate for this injection is: - Correct Answer 2.5 mL/sec
Tachycardia, rapid, shallow breathing, cyanosis are symptoms of what? - Correct Answer Symptoms a
patient in shock may exhibit
The drug SOLU-CORTEF may be classified as - Correct Answer Corticosteroid
Iohexol (ionic or non-ionic?) - Correct Answer Non-ionic contrast material
Ionization chamber - Correct Answer Device used to measure patient dose
T wave - Correct Answer Portion of the cardiac cycle on an electrocardiogram (Ekg) that corresponds
to complete cardiac diastole
CT arthrography - Correct Answer Iodinated contrast is injected directly into the joint space
Iodixanol - Correct Answer aka Visipaque; Iso-osmolar contrast media (IOCM)
Contrast-induced nephrotoxicity (CIN) - Correct Answer Serious decline in renal function following IV
contrast injection
what is Effective dose - Correct Answer Quantity of absorbed radiation dose based on the
radiosensitivity of a particular tissue type
,Advantages of a saline flush immediately following IV contrast - Correct Answer 1. Reduction in
contrast agent dose
2. Reduction in incidence of contrast-induced nephrotoxicity (CIN)
3. Reduction in streaking artifact due to dense contrast agent in the vasculature .
Factors that may affect a patient's calculated glomerular filtration rate? - Correct Answer Age, sex,
race
Medicine administered to dilate the coronary vasculature prior to a cardiac CT exam - Correct Answer
Sublingual nitroglycerin
Normal diastolic blood pressure in an adult - Correct Answer 60-90 mm Hg
Methods to reduce radiation dose to pediatric patients - Correct Answer 1. Reduce mA
2. Limit phases of acquisition (INSTEAD OF W/WO JUST DO W.)
3. Increase pitch
Relationship of radiation exposure and it's potentially harmful effects; stochastic= - Correct Answer
randomly determined; having a random probability distribution or pattern that may be analyzed
statistically but may not be predicted precisely.
Isolation technique that protects against infection through fecal material - Correct Answer Enteric
precautions
Conray aka - Correct Answer Iothalamate meglumine
Omnipaque aka - Correct Answer Iohexol
Isovue aka - Correct Answer Iopamidol
Optiray aka - Correct Answer Ioversol
,CTDIw - Correct Answer The radiation dose index calculation that takes into account the variations in
absorption across the field of view due to beam hardening
Direct contraindications to the administration of Iodinated contrast material include - Correct Answer
prior life threatening reaction
Multiple myeloma
Diabetes
Unit used to express the total patient dose from a helically acquired CT examination - Correct Answer
mGy-cm (milligrays per centimeter)
Components of a comprehensive CT stroke management protocol. - Correct Answer 1.Pre-contrast
sequence of the brain
2. CTA of the brain and carotids
3. CT perfusion (CTP) of the brain
Pleural effusion - Correct Answer An abnormal density located in lung field; has an attenuation value
of +5.0 Houndsfield units
Average attenuation value of simple cyst of the kidney - Correct Answer 0 to +20 Houndsfield units
After initiation of rapid bolus administration of an iodinated contrast agent, the arterial phase of
hepatic contrast enhancement occurs at approximately - Correct Answer 25-30 seconds
The abdominal aorta bifurcates at the level of - Correct Answer L4
On an ECG of the complete cardiac cycle, at which portion on the R-R interval is the heart muscle in
diastole - Correct Answer 55%-75%
The accumulation on gas within a degenerating intervertebral disc is called the - Correct Answer
vacuum phenomenon
During a spiral or helical CT examination, the scanner acquires data - Correct Answer 1. continuously
as the patient travels through the gantry
, 2. in the form of a complete volumetric data set
Which of the following CT studies of the head is typically performed without a contrast agent? -
Correct Answer CT of the brain to r/o subdural hematoma
Phase of renal contrast enhancement that best demonstrates transitional cell carcinoma (TCC) of the
bladder - Correct Answer Excretory
CT examinations of the abdomen are often performed in the right lateral decubitus position to
demonstrate the relationship between the: - Correct Answer Duodenum and the pancreatic head
The section width and spacing for a general survey CT of the neck - Correct Answer 3 mm thick every
3mm
The still viable ischemic cerebral tissue that surrounds the infarct core in a patient with an acute
stroke - Correct Answer Ischemic penumbra
divergent beam - Correct Answer beam does not stay on same path
heterogenuous energy - Correct Answer All the beams coming from the x ray tube are of various
energies
Noise - Correct Answer Scatter adds density (noise)...low photon energy = scatter
Gantry contains: - Correct Answer 1. Tube
2. Detector
3. Collimator
4. Physical filters--absorbs lower energy photons
a. water bath
b. collimator (stops beam from diverging)
c. bow tie filter (removes noise)
Low voltage generator - Correct Answer Located outside of the tube
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