全下肢动脉磁共振血管成像技术的临床应用
Clinical Application of MR Angiography of Whole Lower Extremity Artery
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摘要: 目的:探讨对比剂增强三维磁共振血管成像技术显示下肢动脉病变的价值。方法:对43例有症状患者进行盆腔和全下肢动脉3D CE-MRA检查,再利用后处理软件对原始图像进行减影、最大信号强度投影重组和三段对接,获得不同角度的全下肢血管树结构。结果:42例患者顺利完成检查和后处理编辑,动脉血管显示清晰,图像质量符合诊断要求,检查成功率98%。1例因病情较重,不能坚持平卧和静止不动,未能完成检查。结论:三维磁共振血管成像技术全下肢动脉血管成像可为临床诊断和处置周围动脉闭塞性疾病提供有用的影像信息。Abstract: Objective: To determine the role of three dimensional contrast-enhanced MR angiography(3D CE-MRA) in evaluating the peripheral arterial occlusive disease.Methods: 3D CE-MRA examinations of pelvic and whole lower extremity arteries were performed at 3.0 Tesla MR system in 43 symptomatic patients.Artificial subtraction of source images,reconstruction of maximum intensity projection(MIP) and pasting of three segments in the post-processing software were done step by step,and the vasculature trees of the whole pelvic and lower leg arteries with variable views were obtained.Results: 3D CE-MRA scanning and post-processing editing were successfully completed in 42 patients(98%),arterial vasculature was showed clearly and image was qualified for evaluating the disease.One examination failed due to poor cooperation and severe illness of the patient.Conclusion: 3D CE-MRA provided useful information in clinically diagnosing and managing the peripheral arterial occlusive disease.
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