19F magnetic resonance imaging agents which include a nitroxide moiety
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United States of America Patent
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Nov 8, 1994
Issued Date -
N/A
app pub date -
Dec 1, 1992
filing date -
Oct 25, 1991
priority date (Note) -
Expired
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Abstract
Methods and compositions are disclosed for enhancing .sup.19 F magnetic resonance imaging which utilize .sup.19 F magnetic resonance contrast media having enhanced .sup.19 F relaxivity. Fluorine-containing compounds having enhanced .sup.19 F relaxation properties resulting from direct association with an unpaired spin are disclosed. The fluorine-containing compound is associated with the unpaired spin by covalent attachment of a stable free radical, by complexation of a fluorinated complexing agent with a paramagnetic metal ion, or by salt formation or charge neutralization of a paramagnetic ion.
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