The present invention relates to the use of persistent free radicals, in particular persistent free radicals having a carbon-based .pi.-bonded electronic system available for delocalization of the unpaired electrons as image enhancing agents in magnetic resonance imaging (MRI), in particular electron spin resonance enhanced magnetic resonance imaging (ESREMRI). The invention also relates to contrast media containing such radicals and to the use of such radicals and their non-radical precursors in the manufacture of MRI and ESREMRI contrast media.
本发明涉及使用持久自由基,特别是具有碳基π-键电子系统可用于解离未成对电子的分散作用的持久自由基,作为磁共振成像(MRI)中的图像增强剂,特别是电子自旋共振增强磁共振成像(ESR
EMRI)。本发明还涉及含有这样的自由基的对比剂,以及在制造MRI和ESR
EMRI对比剂时使用这样的自由基及其非自由基前体。