- A substance, including barium or air, used in radiography to increase the contrast of a picture. An optimistic comparison medium absorbs x-rays much more highly compared to the tissue or construction being analyzed; a bad contrast medium, less highly.
- Any material, particularly barium sulfate, utilized in radiography to improve the visibility of interior structures
- a substance that is opaque to x-rays; whenever administered permits a radiologist to examine the organ or structure it fills
Hypernym for "contrast medium"
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