| http://www.w3.org/ns/prov#value | - In the United States half of CT scans involve radiocontrast agents.[17] The most common reactions from these agents are mild, including nausea, vomiting and an itching rash; however, more severe reactions may occur.[18] Overall reactions occur in 1 to 3% with nonionic contrast and 4 to 12% of people with ionic contrast.[19] Skin rashes may appear in 1 to 3% within a week.
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