2015-05-042015-05-042002-03-12Alford, John M. and Wilson, Lon J., "Fullerene contrast agent for magnetic resonance imaging and spectroscopy." Patent US6355225B1. issued 2002-03-12. Retrieved from https://hdl.handle.net/1911/79844.https://hdl.handle.net/1911/79844A non-toxic contrast agent for enhancing contrast in in vivo magnetic resonance measurements, comprised of a water-soluble, stable paramagnetic fullerene that is free of paramagnetic metal species. A preferred contrast agent is a fullerol having at least one unpaired electron.10 ppengUtility patentUS6355225B1