There is provided a contrast medium composition comprising: (a) a first contrast agent comprising a physiologically tolerable manganese compound together with an uptake promoter, having a manganese concentration of at least 0.3 mM or being in a dosage unit form containing at least 300 .mu.mol manganese,...http://www.google.es/patents/US5863519?utm_source=gb-gplus-sharePatente US5863519 - Composition and method of MRI using both a positive and a negative contrast agent
Composition and method of MRI using both a positive and a negative contrast ...
