摘要
目的:探讨CT血管成像(CTA)和磁共振血管成像(MRA)对脑动脉狭窄的诊断价值。方法:52例临床拟诊为脑动脉硬化的患者均行颅脑CTA和3D-TOF-MRA检查,其中23例同时行DSA检查。分析不同影像方法对血管狭窄的显示情况及部位分布。结果:52例患者MRA共显示脑血管狭窄73处,其中Ⅰ～Ⅱ级17处,3处CTA显示相应部位无狭窄;Ⅲ～Ⅳ级56处,6处CTA显示相应部位无狭窄,13处CTA显示相应部位为Ⅰ～Ⅱ级狭窄;4处MRA显示无狭窄而CTA显示狭窄。23例行DSA检查的患者,MRA诊断脑动脉狭窄42处,DSA诊断相应部位血管狭窄36处,MRA假阳性率为14.3%、过度诊断率为57.1%;CTA显示动脉狭窄37处,CTA假阳性率为2.7%,过度诊断率为29.7%。结论:CTA对脑动脉狭窄具有较高的检出率及诊断符合率,能较真实地反映脑动脉狭窄情况;3D-TOF-MRA简便、无创,可作为筛选脑动脉狭窄的重要手段。
Objective：To study the value of CT angiography （CTA） ,MR angiography （MRA） and digital subtraction angiography （DSA） in the diagnosis of intra-cranial arterial stenosis. Methods： Fifty two patients with clinically suspected intra cranial arteriosclerosis were studied with CTA and 3D-TOF-MRA, twenty-three patients underwent DSA at the same time. The degree of seriousness and location of the stenosis shown by various imaging techniques were analyzed. Results：Of the 52 cases,73 places of stenosis were assessed by MRA,17 places were diagnosed as Grade Ⅰ- Ⅱ stenosis,but 3 of them were normal on CTA;56 places were diagnosed as Grade Ⅲ -Ⅳ stenosis,but 6 of them were normal and 13 of them were diagnosed as Grade Ⅰ - Ⅱ stenosis on CTA;4 places were diagnosed as normal by MRA but stenoses were showed on CTA. Of the 23 patients having DSA, 42 places showed stenosis depicted on MRA but only 36 were diagnosed as stenosis by DSA. The false positive rate of MRA was 14.3% and the overestimation rate was 57. 1%. Of the 37 places with stenoses depicted on CTA,36 places of stenosis were assessed on DSA. The false positive rate of CTA was 2.7% and the overesti marion rate was 29.7%. Conclusion：CTA showed relatively high detectability and accuracy in the diagnosis of intra-cranial arterial stenosis,reflecting a more true and reliable situation of the lesion. 3D-TOF- MRA is noninvasive and convenient, which is an important modality for the screening of intra-cranial arterial stenosis.
出处
《放射学实践》
北大核心
2009年第3期255-259,共5页
Radiologic Practice
