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contrast |
Also found in: Dictionary/thesaurus, Medical, Wikipedia, Hutchinson | 0.03 sec. |
contrastThe white level of a display screen. The contrast adjusts how bright the white is. See brightness and contrast ratio. contrast 1. (in painting) the effect of the juxtaposition of different colours, tones, etc. 2. a. (of a photographic emulsion) the degree of density measured against exposure used b. the extent to which adjacent areas of an optical image, esp on a television screen or in a photographic negative or print, differ in brightness 3. Psychol the phenomenon that when two different but related stimuli are presented close together in space and/or time they are perceived as being more different than they really are How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Current MRI contrast agents "have no affinity for the cholesterol plaque," notes medicinal chemist David Cormode of the Mt. The technology transforms contrast agents made of nano-sized droplets into micron-sized bubbles that emanate reflected signals required to obtain tumor tissue images. As a result of the survey, we have a better picture of the indications for low-osmolar contrast agents being used in clinical practice throughout the United States. |
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