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磁共振成像(magnetic resonance imaging,MR I)已成为评价脑缺血的最常用方法之一。多模式成像技术包括弥散加权成像(d iffusion-weighted ima-ging,DW I)、血流灌注成像(perfusion-weighted im-aging,PW I)及MR三维血管成像,已广泛应用于临床工作[1~3]。但是MR I也有自己的不
Magnetic resonance imaging (MRI) has become one of the most commonly used methods to evaluate cerebral ischemia. Multimodality imaging techniques include DWI, perfusion-weighted im-aging (PWI) and MR angiography have been widely used in clinical practice [1 ~ 3]. But MRI also has its own no