3d image of iohexol skeletal formula

iohexol contrast agent x-ray imaging x-ray arteries veins ventricles urinary system joints computed tomography scan visualizing side effects vomiting skin flushing headache itchiness kidney problems low blood pressure allergic reactions seizures hypothyroidism povidone-iodine iodinated non-ionic radiocontrast osmolality rendering substance matter material compound component stuff reagent functional group precursor synthesis reaction production building block effect iatrogenic overdose contraindications interaction