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  • Contrast media used to enhance the differences in signal intensity emitted from tissues during x-ray-based imaging procedures (e.g., computed tomography, fluoroscopy). Radiographic contrast media typically consist of chemicals incorporating elements with high molecular weights that attenuate x-rays much more than soft tissue or body fluids (e.g., barium, iodine). Radiographic contrast media may be administered by various routes including intravenous injection or direct administration into body cavities (e.g., genitourinary tract injection, oral ingestion, rectal enema).
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