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Oral contrast agents

Positive contrast: T1 hypersignal

• Gadolinium chelates: Magnevist enteral®, Gadolite®
• Manganese chelates: Lumenhance®
• Ferric amonium citrate: Ferriseltz®

Negative contrast: T2 hyposignal

• SPIO: Lumirem®, Gastromark®
• Barium sulfate
• Blueberry or pineapple juice