体部磁共振血管成像的临床价值

Clinical application of magnetic resonance angiography in the body

目的 确定磁共振血管成像 (MRA)对体部血管病变诊断的准确性。 方法 对 171例可疑体部血管病变患者行MRA检查 ,并与X线血管造影 (XRA)及手术结果比较。 结果 MRA显示静脉异常 12例 ,正常 6例 ,与XRA及手术结果一致。MRA显示动脉瘤 5 4例 ,其中主动脉夹层瘤 2 6例、主动脉瘤 15例与手术结果一致 ;周围动脉瘤 13例 ,动脉瘤 14个 ,而手术及XRA结果显示动脉瘤16个 ,2个动脉瘤MRA未显示 ,MRA的敏感度是 97%。 84例可疑周围动脉狭窄患者中 ,MRA显示狭窄 182段 ,XRA及手术显示 175段 ,MRA的敏感度为 95 % ,特异度 89% ,准确度 92 %。 结论 MRA对体部血管病变诊断的符合率较高 ,在许多病例能代替XRA。

Objective To identify the accuracy and reliability of magnetic resonance angiography (MRA) in evaluating patients with vascular lesions in the body. Methods 171 patients with suspected vascular lesions in the body were examined by MRA and compared with the results of X ray angiography (XRA) or operation. Results MRA showed abnormal vein in 12 patients and normal in 6 correspanding to XRA or operation. MRA revealed aneurysm in 54 patients: aortic dissection (26), aortic aneurysm (15) and peripheral aneurysm (13). Two peripheral aneurysms could not only be found by MRA. The sensitivity of MRA was 97% for aneurysm lesions. The sensitivity of MRA in the diagnosis of suspicious peripheral artery stenosis in 84 patients was 95%, the specificity 89%, and the accuracy 92% in comparison with those of XRA and operation. Conclusion MRA is accurate and reliable in evaluating vascular lesion in the body and can replace XRA in many cases.