4. Contrast media is used in radiography to increase the clarity of the image. The iodine or barium in contrast dye is very dense and "absorbs" X-ray photons at a greater rate than the body's soft tissues. Low osmolality contrast & premedication helps. Patients are frequently asked about iodine or seafood allergy before IV contrast material is administered because of a commonly held belief among radiologists and others in the medical community of a specific cross-reactivity between iodinated radiographic contrast material and other iodine-rich substances. Having a reaction to an iodine-based contrast dye is also not the same as an allergy to seafood, which may be rich in iodine. Obviously speak with your physician about what to do. The higher the iodine concentration, the greater the risk of an adverse reaction. 3. Hi all, I urgently need to have a scan of abdomen and pelvic area, but I’m allergic to the iodine contrast dye that they inject. Not a doctor; responding to A2A. A non-iodinated contrast media is one that does not contain iodine and may instead contain barium or other non-iodinated media as the radio opaque substance. 9. This causes the same reaction as the histamine release due to allergy. Contrast media (sometimes called contrast agents or dye) are chemical substances used in medical X-ray, magnetic resonance imaging (MRI), computed tomography (CT), angiography, and occasionally ultrasound imaging. There are different kinds of contrast used. Sometimes, contrast dye (or contrast) is used in imaging scans to help your doctors see your organs better. Iodinated contrast media are toxic to the kidneys and kidney functions. Requesting / Referring Physician to prescribe Premedication, to be initiated prior to the CT exam. ... is there another alternative to this dye. Alternative to iodine contrast for CT colonograghy ? Rather, contrast media act to directly release histamine and other chemicals from mast cells. "Iodine allergy" is often used as a collective term for adverse reactions to these agents. About Contrast Dye. The body part with the contrast inside will appear lighter on the radiographic image than the surrounding tissue. Shellfish allergy has nothing to do with iodine or contrast. locations for imaging of patients with prior history of allergy to iodine. The iodine concentration has an effect on the severity of an adverse reaction. Foss • • 16 Replies. The increasing concerns for using gadolinium-based contrast agents in patients with renal or liver disease is urging researchers to find an alternative. Strictly speaking, a reaction to an iodine-based dye is not the same thing as an allergy to iodine because it generally doesn’t stem from the same type of immune-system response as a true allergy. I believe there are some options out there. Some of it depends on how bad the kidney disease IS and what type. 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