下肢动脉狭窄性病变中三维增强磁共振血管成像和CT血管成像的对照分析

目的评价三维增强磁共振血管成像(3D CE-MRA)和CT血管成像(CTA)技术在下肢动脉狭窄性病变的应用价值。方法对195例疑有下肢动脉狭窄患者,49例行3D CE-MRA检查,其中10例行数字减影血管造影(DSA)检查;149例行CTA检查,其中20例行DSA检查。将每条下肢动脉分9个节段,分别对2组病例以DSA为金标准进行效果评价,对比2种检查方法差异。结果①3D CE-MRA与DSA对比,准确率94.4%,敏感性100%,特异性100%,2种方法差异无统计学意义(χ2=0.262,P>0.05)。②CTA与DSA对比,准确率96.4%,敏感性100%,特异性100%,其中Ⅱ级以上狭窄准确率94.9%,敏感性100%,特异性97.6%,2种方法差异无统计学意义(χ2=0.194,P>0.05)。结论3D CE-MRA与CTA在下肢动脉狭窄性病变诊断中均具有较高价值,二者能准确评价下肢动脉狭窄性病变,是可靠、无创的检查方法。

Comparison of three-dimensional contrast enhanced magnetic resonance angiography and CT angiography in lower extremity arteriostenosis disease

Objective To evaluate the clinical value of three-dimensional contrast enhanced magnetic resonance angiography(3D CE-MRA) and CT angiography(CTA) in arteriostenosis disease of lower extremity.Methods One hundred and ninety five patients suspected of having lower extremity arteriostenosis disease,among these patients:49 patients underwent 3D CE-MRA,10 case carried out digital substraction angiography(DSA);149 patients underwent CTA,20 case carried out DSA.Every lower extremity was divided into 9 vascular segments,to contrast the difference between 2 groups using DSA as gold standard.Results ① Comparing with DSA,the accuracy rate,sensibility and specificity of 3D CE-MRA were 94.4%,100% and 100%.There was not significant difference between the 2 methods(χ2=0.262,P>0.05).② Comparing with DSA,the accuracy rate,sensibility and specificity of CTA were 96.4%,100% and 100%.There was not significant difference between the 2 methods(χ2=0.194,P>0.05).Conclusion Both 3D CE-MRA and CTA are good at evaluating the lower extremity arteriostenosis disease,they can evaluate lower extremity arterio-stenosis disease exactly.Both of these methods are reliable and non-invasive techniques.