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CT Contrast
CT Contrast
In computed tomography (CT), intravenous iodinated contrast is
used to enhance the image with information on the vascularity and
characteristics of organs and pathologic lesions. The iodine density
blocks the passage of the x-ray photons, causing the contrast to
appear denser (white) on the CT images.
There is a low but non-negligible level of risk
associated with intravenous iodinated contrast agents. Certain
patients may experience severe and potentially life-threatening
allergic reactions to the contrast dye.
The contrast agent may also induce kidney damage.
The risk of this is increased with patients who have preexisting
renal insufficiency, preexisting diabetes, or reduced intravascular
volume. In general, if a patient has normal kidney function, then
the risks of contrast nephropathy are negligible. Patients with a history of the following are required to have a
recent BUN and creatinine to check for kidney function prior to
receiving intravenous iodinated contrast.
When to use CT Contrast
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