In some thyroid diseases (e.g. autonomic nodule, latent hyperthyroidism), the use of X-ray or CT contrast medium (KM) can have life-threatening effects (thyrotoxic crisis). For patients with iodine intolerance, we make every effort to offer another examination without contrast medium or to use a different contrast medium as well. If an examination with X-ray or CT (KM) contrast medium is nevertheless medically necessary, a medication will be administered before the examination to prevent the absorption of iodine into the body.