<prompt> All of the following are true about iodinated intravascular contrast media exceptThey are used in digital subtraction angiographyThey are radio opaqueThey can cause anaphylactic reactionsThey are used in magnetic resonance imaging  <response>: MRI functions through different principles and thus utilizes different contrast agents. Gadolinium is the most commonly used contrast in MRI.Both gadolinium-based and iodinated contrast media are used for digital subtraction angiography.Radiocontrast agents are radiopaque.Radiocontrast agents are excreted by the kidney.Radiocontrast agents can cause anaphylactoid reaction and nephropathy. 