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目的探讨主动脉夹层伴血栓形成患者的MRI影像特点。方法12例确诊为主动脉夹层伴血栓形成的患者,行快速小角度梯度回波T1WI、快速自旋回波T2WI、三维增强磁共振血管成像、心电门控真稳态进动快速成像及半傅立叶转换单次激发快速自旋回波扫描,观察主动脉夹层伴血栓形成在各序列的信号特点。结果急性期血栓在各序列为低信号或等信号;亚急性期血栓在各序列均为高信号;慢性期血栓在各序列为低信号或等信号。结论主动脉夹层伴血栓形成是主动脉夹层的一种特殊类型,应用MRI的多种序列组合可以增强我们对主动脉夹层伴血栓形成作出正确的诊断。
Objective To investigate the MRI features of patients with aortic dissection and thrombosis. Methods Twelve patients with aortic dissection and thrombosis were diagnosed as fast small angle gradient echocardiography (T1WI), fast spin echo T2WI, three-dimensional contrast-enhanced magnetic resonance angiography, rapid echocardiographic steady- Single shot rapid spin echo scan was performed to observe the signal characteristics of aortic dissection with thrombus in each sequence. Results Acute thrombosis in each sequence of low signal or equal signal; subacute thrombosis in each sequence are high signal; chronic thrombus in each sequence of low signal or equal signal. Conclusion Aortic dissection with thrombus formation is a special type of aortic dissection. Using multiple sequence combinations of MRI can enhance our correct diagnosis of aortic dissection with thrombosis.