A substance, such as barium or air, used in radiography to increase the contrast of an image. A positive contrast medium absorbs x-rays more strongly than the tissue or structure being examined; a negative contrast medium, less strongly.
American Heritage Medicine
Other Word Forms of Contrast Medium
Contrast Medium Sentence Examples
In patients undergoing peripheral angiography, there should be pulsation in the artery into which the X-ray contrast medium will be injected.
Digital subtraction angiography For cardiac imaging the contrast medium may be administered intra-arterially by selective catheterisation to provide subtracted images.
Medical investigations The best way to confirm the diagnosis is to inject the bursa with a contrast medium and x-ray it.