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Contrast agents are administered for about 30-40% of MRIs. These are typically T1 relaxivity improving agents which use Gadolinium(III). There are six Gd(III) contrast agents FDA approved for clinical use in the United States and ten in Europe.

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Q: Do you inject dye into a patient when doing an fmri?
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Is there something called sensitivity test for fluorescein dye before performing fluorescein fundus angiography?

Yes. It's a test to see if the patient is allergic to the contrast or dye before they inject her with it.


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