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颈动脉粥样硬化不稳定斑块的高分辨磁共振特点及应用 被引量:6

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摘要 目的根据颈动脉粥样硬化斑块的病理基础研究相应高分辨磁共振(MRI)特点,探讨其对临床干预的指导意义。方法用彩超筛选出颈动脉狭窄≥70%的患者,行高分辨MRI检查,检查序列包括T1WI、T2WI、质子加权成像(PDWI)和三维时间飞跃法(3DTOF)等。其中62例患者检查后1周内行颈动脉内膜剥脱术(CEA),对术后斑块标本进行H-E染色,观察脂质纤维成分、纤维帽、脂质坏死池、板块内出血、钙化等并与高分辨MRI逐层对比分析。结果 62例斑块中48例(77%)有脂质坏死核心,脂质坏死池在T1WI、T2WI、PDWI上呈高信号,在3DTOF上呈等信号或稍高信号;40例(65%)合并钙化,钙化部分在各序列上均呈低信号;25例(40%)出现斑块内出血,斑块内出血随着出血时间不同而呈现不同的信号;43例(69%)斑块合并有纤维化,纤维化在3DTOF上呈等信号,在T1WI、T2WI和PDWI上呈高信号或稍高信号;10例(16%)斑块合并血栓,"黑血"技术T1WI和T2WI对血栓较敏感。结论高分辨MRI不同序列检查可以显示斑块结构特点及成分特征,可以评价斑块的稳定性并为临床治疗提供参考。
作者 宋燕
出处 《中国实用神经疾病杂志》 2012年第20期59-60,共2页 Chinese Journal of Practical Nervous Diseases
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