Keywords Magnetic resonance imaging,Perfusion weighted imaging,Glioma,Grading,Relative cerebral blood volume,Vascular endothelial growth factor,Microvessel density,Angiogenesis;

• 磁共振成像;灌注成像;胶质瘤;分级;相对性脑血流容积;血管内皮生长因子;微血管密度;血管生成;