Contrast Medium
From Kidney Cancer Resource
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Overview
In a medical setting, a contrast medium is any substance that is used to enhance the visibility of structures or fluids within the body. An example of this is the use of a radiopaque substance during an x-ray exam to highlight features that would otherwise be less distinguishable from nearby tissue. Another example is the use of air bubbles during an echocardiogram to search for a shunt in the heart.
References
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