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Ct registry review 1Iothalamate meglumine - answer Aka Conroy; Ionic radiopaque contrast media (RCM)
An average range for activated PTT - answer25-35 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 - answer15 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: - answer2.5 mL/sec
Tachycardia, rapid, shallow breathing, cyanosis are symptoms of what? - answer
Symptoms a patient in shock may exhibit
The drug SOLU-CORTEF may be classified as - answer Corticosteroid
Iohexol (ionic or non-ionic?) - answer on-ionic contrast material
Ionization chamber - answerDevice used to measure patient dose
T wave - answerPortion of the cardiac cycle on an electrocardiogram (Ekg) that
corresponds to complete cardiac diastole
CT arthrography - answerIodinated contrast is injected directly into the joint space
Iodixanol - answeraka Visipaque; Iso-osmolar contrast media (IOCM)
Contrast-induced nephrotoxicity (CIN) - answerSerious decline in renal function
following IV contrast injection
what is Effective dose - answerQuantity of absorbed radiation dose based on the
radiosensitivity of a particular tissue type
Advantages of a saline flush immediately following IV contrast - answer1. 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? - answerAge,
sex, race
,Medicine administered to dilate the coronary vasculature prior to a cardiac CT exam -
answerSublingual nitroglycerin
Normal diastolic blood pressure in an adult - answer60-90 mm Hg
Methods to reduce radiation dose to pediatric patients - answer1. 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= -
answerrandomly 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 - answerEnteric
precautions
Conray aka - answerIothalamate meglumine
Omnipaque aka - answerIohexol
Isovue aka - answerIopamidol
Optiray aka - answerIoversol
CTDIw - answerThe 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 -
answerprior life threatening reaction
Multiple myeloma
Diabetes
Unit used to express the total patient dose from a helically acquired CT examination -
answermGy-cm (milligrays per centimeter)
Components of a comprehensive CT stroke management protocol. - answer1.Pre-
contrast sequence of the brain
2. CTA of the brain and carotids
3. CT perfusion (CTP) of the brain
Pleural effusion - answerAn abnormal density located in lung field; has an attenuation
value of +5.0 Houndsfield units
Average attenuation value of simple cyst of the kidney - answer0 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 - answer25-30
seconds
The abdominal aorta bifurcates at the level of - answerL4
On an ECG of the complete cardiac cycle, at which portion on the R-R interval is the
heart muscle in diastole - answer55%-75%
The accumulation on gas within a degenerating intervertebral disc is called the -
answervacuum phenomenon
During a spiral or helical CT examination, the scanner acquires data - answer1.
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? - answerCT of the brain to r/o subdural hematoma
Phase of renal contrast enhancement that best demonstrates transitional cell carcinoma
(TCC) of the bladder - answerExcretory
CT examinations of the abdomen are often performed in the right lateral decubitus
position to demonstrate the relationship between the: - answerDuodenum and the
pancreatic head
The section width and spacing for a general survey CT of the neck - answer3 mm thick
every 3mm
The still viable ischemic cerebral tissue that surrounds the infarct core in a patient with
an acute stroke - answerIschemic penumbra
divergent beam - answerbeam does not stay on same path
heterogenuous energy - answerAll the beams coming from the x ray tube are of various
energies
Noise - answerScatter adds density (noise)...low photon energy = scatter
Gantry contains: - answer1. 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)
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