Why inject contrast for magnetic resonance angiography?
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Prince
D003287:Contrast Media / Q000008:administration & dosage*; D005682:Gadolinium / Q000008:administration & dosage; D006801:Humans; D007275:Injections, Intravenous; D018810:Magnetic Resonance Angiography; D012449:Safety; D014652:Vascular Diseases / Q000175:diagnosis*
D003287:Contrast Media; D005682:Gadolinium