- Allergic reaction to contrast dye
There is a small risk of allergic reaction to this dye, which commonly results in a rash or itchiness. If you know you have an allergy to contrast material, tell your doctor.
Modern CT scanners use x-rays, a type of radiation that has been linked to cancer. While CT scans produce more radiation than other types of imaging, the risks of this radiation must be balanced against the need for the CT scan. To minimize risks, CT scans should only be used where necessary.
People at increased risk include younger people and people who have had repeat scans. CT scans are avoided in these people unless medically necessary.
If you are pregnant or think you might be pregnant, talk to your doctor. CT scans are best avoided in pregnancy, as there is a risk that the radiation could harm the unborn baby.