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Doctor insights on: Types Of Iodine Contrast Used In Ct Scans

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Is it possible to become allergic to the iodine contrast used for CT scans if I continuously have them? Does frequency matter?

Is it possible to become allergic to the iodine contrast used for CT scans if I continuously have them? Does frequency matter?

Iodine sensitivity: Yes it is possible. If you every think you do have a reaction, you should report it immediately and not get the iodine dye again. ...Read more

Dr. M. Hytham Beck
1 Doctor shared a insight

Computed Tomography (Definition)

Ct uses xrays taken an 360 degrees combined with a computer to see"inside" the body. The table moves as the xray tube and detectors spin around the patient 10 times a second or more! The image shows excellent soft tissue detail, enhanced with injection of intravenous contrast or oral contrast. This way the body is shown in slices, in any plane, usually axially, but ...Read more


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Can iodine contrast used for CT scan inadvertently improve symptoms or issues?

Can iodine contrast used for CT scan inadvertently improve symptoms or issues?

Probably not: I like to keep an open mind but there is no scientific evidence that contrast used for CT can be used to treat disease.

If you are feeling better after a CT exam, it is likely that you were on your way to getting better before the scan and the improvement continued after the scan to a point that you then noticed it. ...Read more

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I've had 3 CT scans with iodine contrast (my third one I had today) & multiple MRI's with contrast. Will this damage my kidneys?

I've had 3 CT scans with iodine contrast (my third one I had today) & multiple MRI's with contrast. Will this damage my kidneys?

Contrast OK but CT: Exposure might be a little too much. Each time you get contrast, your kidneys will easily excrete it. As long as the doses are separated by a day or more, it won't hurt your kidneys. At only 19, you should talk to your doctor about ways to reduce the number of CTs to limit the ionizing radiation. MRIs and Ultrasounds have no ionizing radiation and are considered low risk for future cancer. ...Read more

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Is taking iodine helpful when exposed to radiation via CT scans /multip. X-rays? The japanese took it after bomb and nuclear disaster.

Is taking iodine helpful when exposed to radiation via CT scans /multip. X-rays? The japanese took it after bomb and nuclear disaster.

See answer: Iodine “tablets” doesn’t prevent damage from radiation per se, but blocks the uptake of radioactive iodine. After nuclear disasters in addition to emitted “waves”, radioactive isotopes such as radioactive iodine are created. Taking the iodine supplement only blocks those – and would have no benefit in a ct scanner to prevent concerns from x-radiation exposure. ...Read more

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After CT scan what is duration of contrast medium (iodine) in body?

After CT scan what is duration of contrast medium (iodine) in body?

Are you sure.: If radio active iodine is used it is i-131 which has half life of less than 9days, then calculate every 9 days half of it will be eliminated in the body with I -131. Not bad if we did not synthesize i- 131 imagine if it is i- 129 which had half life of 15.7 million years. ...Read more

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Can you be allergy tested for iodine constrast dye before CT scan?

Not aware of testing: The risk of an adverse reaction to non ionic IV contrast dye is very low, less than 1 in 100 injections. Most of the reactions are mild and easily treated. Severe reactions occur in 1-2 per 10, 000 injections of IV non ionic contrast.

If a person was severely allergic to many different things, perhaps a consultation with an allergist could be obtained. ...Read more

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I take 5 mg of methimazole daily for hyperthyroidism. What do I do before or after a CT scan with iodine contrast?

Iodine hyperthyroid: The iodine load of a CT scan can sometimes stimulate the thyroid to make more T4 and T3 (liothyronine) and worsen hyperthyroidism. But it probably will not, especially if your hyperthyroidism is controlled and you are taking your methimazole. Talk to your doctor. You may want to get your thyroid blood level checked about 2-4 weeks after the CT scan. ...Read more

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Due to have CT scan worried about allergy to contrast injection as my Son had Urticaria for a week two days after CT Scan with Contrast with Iodine. Have allergy to Almonds some metals nickel among others things. Suggestions please? Antihistimine?

Due to have CT scan worried about allergy to contrast injection as my Son had Urticaria for a week two days after CT Scan with Contrast with Iodine. Have allergy to Almonds some metals nickel among others things. Suggestions please? Antihistimine?

Talk to your: Doctor about your concerns and allergy history. If you have a history of multiple allergies, you may be a candidate for pretreatment to minimize the chances of a reaction. The facility should have a protocol for this which could include one or more medications, so don't try to treat yourself. ...Read more

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What is an alternative to iodine used in CT with contrast? Say, someone is allergic to shellfish....What is an alternative contrast to use?

Reaction to contrast: Contrast media reactions are often described as allergy but in truth are not allergy. The high concentration of the contrast can shock cells called basophils into releasing their granules filled with histamine. This causes the same reaction as the histamine release due to allergy. Shellfish allergy has nothing to do with iodine or contrast. Low osmolality contrast & premedication helps. ...Read more

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Is it common to administer iodine CT contrast orally AND through IV for the same test and why would they do that?

Yes: The oral contrast shows the intestines on X ray and the injectable contrast shows the vessel system on X ray. ...Read more

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Do hospitals supply iodine pills before a CT scan?

No: It's not necessary. The amount of radiation is small. ...Read more

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If I am allergic to topical iodine, can I have intrevenous iodine for a CT scan with no reaction?

If I am allergic to topical iodine, can I have intrevenous iodine for a CT scan with no reaction?

Maybe: Ct contrast agents is usually iodinated and are classifed as either ionic or non-ionic. Some are more allergy-prone than others. Ct scan contrast is totally different than MRI contrast. In contrast, MRI contrast agents usually contains chelated gadolinium. Tell the radiologist about your previous ct scan contract allergic symptoms when getting your mri. ...Read more

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Hi, can iodine CT scan miss 2 CM aneurysm? I guess it can seem a weird question with a obvious no but I d like to be sure. Thanking you in advance.

Hi, can iodine CT scan miss 2 CM aneurysm? I guess it can seem a weird question with a obvious no but I d like to be sure. Thanking you in advance.

Brain Aneurysm: I assume you mean brain aneurysm, in which case the answer is no. A 2cm aneurysm is very large and will be easily detected by contrasted (or non/contrast) ct scan. If by chance you are mistaken and mean 2millimeter, not centimeter, it is very easy for a ct to miss. ...Read more

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Did my CT scan said to drink 6-8 glasses of water for the next 3 days to clear my system from iodine, what happens if I don't? Not a water person..

Did my CT scan said to drink 6-8 glasses of water for the next 3 days to clear my system from iodine, what happens if I don't? Not a water person..

Xray "dye" & water: Any time u have an imaging study like ct scan where contrast ("dye") is used it is recommended to flush the kidneys with plenty of water for next few days to prevent damage to the kidney filtering system. ...Read more

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How normal would it be for my left kidney to be sore after an iodine injection for a CT scan?

No: If there is a blockage of the kidney's urine drainage the the increased urine flow from the contrast injection can provoke grater distension of the renal collecting system which could well cause soreness. Let your doctor know about this to check for any compromise of your urinary drainage from a stone or ureteral stricture. ...Read more

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I have allergy to iodine and gastrografin needed for CT scan. Is it safe?

Yes, but...: Reactions to contrast are usually not caused by a true allergy to iodine (which is rare). Low-ionic strength contrast should be used if you have a history of reactions to contrast, and the radiologist will give you antihistamines and corticosteroids (prednisone) before the test to help prevent a reaction. With this regimen, scans are usually very safe. Talk with the radiologist about your concerns. ...Read more

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I did a ct scan with iodine would that show an unruptured brain aneurysm?

I did a ct scan with iodine would that show an unruptured brain aneurysm?

Maybe: Depending on the size and location of the aneurysm, it can be detected with a CT scan with iodine. However, brain aneurysms are detected more frequently and with smaller sizes with CT or MR angiography techniques. ...Read more

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I have allergy to iodine. Gastrografin needed for CT scan. Is it safe for me to take?

No: If you have iodine allergy, you will need to premedicate with benedryl and possibly solumedrol (methylprednisolone). You do not "need" gastrografin for your study. You can drink barium and this will be safe for you. ...Read more

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What to do if I have allergy to iodine (lugols/surg prep.) gastrografin needed for CT scan. Is it safe for me to take?

Allergy: It probably wouldn't be cross reactive with gastrograffin because the allergy is not really to the iodine atom. However, if there is concern, there are alternatives to gastrograffin. For example, a diluted barium preparation, which contains no iodine, is perfectly appropriate as a CT oral contrast agent under most circumstances ...Read more

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What are the side effects of an unruptured brain aneurysm and how can I tell if my CT with iodine scan failed to show any signs of an aneurysm?

A small: Aneurysm generally won't cause any symptoms. A larger aneurysm could cause symptoms based on its location and what structures it is pressing on. Presumably the radiologist would have diagnosed an aneurysm if it was visible on CT, but unless the CT was specifically tailored to look for an aneurysm (CTA), a small aneurysm might not be visible on a routine CT. ...Read more

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Am I able to take a Multi-vitamin that contains Iodine when I am allergic to shrimp? I had to be on an antihistamine while prepping for a CT scan.

The shellfish: Allergy leading to an increased risk of iodinated contrast allergic reaction is a myth that, unfortunately, is difficult to eradicate. There is nothing special about a shellfish allergy, if you have multiple allergies you are at some increased risk of a contrast reaction whether or not one of the allergies is shellfish. Also, no one can be allergic to molecular iodine. You can take the vitamin. ...Read more

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Ins. Refused pet scan. Say mri/ CT w/o iodine (allergy). Just as good at finding problems? 2 yrs post hr re cc met. Pet oct.'12. See profile for dx.

Ins. Refused pet scan. Say mri/ CT w/o iodine (allergy). Just as good at finding problems? 2 yrs post hr re cc met. Pet oct.'12. See profile for dx.

I agree with: Insurer. U/s and mr of liver better than non-contrast ct. There are preps to try, but need contrast timed to check for liver metastais. Two year disease free interval is good for you. Pet scans are very expensive and not clearly more sensitive. I'd get mr. ...Read more

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What are normal reactions to iodine during CT angiogram?

What are normal reactions to iodine during CT angiogram?

Warm flush: Warm flush lasting a few seconds. Allergies may cause more severe reactions, but, can usually be treated with medication. ...Read more