That (foul tasting) liquid that you drink before a CAT scan, what is it and what does it do?

That (foul tasting) liquid that you drink before a CAT scan, what is it and what does it do?
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1 Answer

Answer :

Usually barium sulfate used for contrast. Essentially, the barium sulfate fills up your bowels so they can be seen different from the surrounding tissue. Little bit more here: http://en.wikipedia.org/wiki/Contrast_medium
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