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on-line medium.
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a radiopaque substance injected into a part of the body, as the stomach or duodenum, to provide a contrasting background for the tissues in an x-ray or fluoroscopic examination.
noun
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med a radiopaque substance, such as barium sulphate, used to increase the contrast of an image in radiography
"Collins English Dictionary — Complete & Unabridged"
2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986
© HarperCollins Publishers 1998, 2000, 2003, 2005,
2006, 2007, 2009, 2012
contrast medium
Scientific
/ kŏn′trăst′ /
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A substance, such as barium or air, used in radiologic studies to increase the contrast of an image. In x-ray imaging, a positive contrast medium absorbs x-rays more strongly than the tissue or structure being examined; a negative contrast medium, less strongly.
Etymology
First recorded in 1950–55
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any
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You will need to drink a solution of a contrast medium for the scan, and there’s a very low level of radiation exposure.
From
Washington Post
• Jan. 14, 2022
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
