Iodine-Based X-ray Contrast Agents (Iodinated Contrast)

Iodine-based X-ray contrast agents are pharmaceutical preparations containing iodine, used to enhance the visibility of internal structures during X-ray imaging procedures like CT scans and angiography. These agents increase X-ray attenuation in targeted tissues and vessels, improving diagnostic accuracy. They are available in ionic and non-ionic forms, with non-ionic agents generally preferred due to their lower osmolality and reduced risk of adverse reactions. Common examples include iohexol, iopamidol, and diatrizoate. While effective, their use is associated with potential adverse effects, including hypersensitivity reactions and nephrotoxicity, particularly in patients with pre-existing renal impairment.

Other names

Iodinated contrast mediaIodine contrast agentsX-ray contrast agentsRadiopaque contrast agents

Enhancement of X-ray attenuation via photoelectric absorption by iodine atoms within the contrast agent, leading to increased radiodensity of targeted tissues or vessels.