Willis环的3D MRA、3D FSPGR和DSA对比研究  

Wills Circle:The Comparative Study on 3D MRA,3D FSPGR and DSA

作　　者：陈述花[1] 于铁链[1] 张云亭[1] 孙建中[1] 刘国栋[1] 陆国庆[1] 范红[1] 

机构地区：[1]天津医科大学总医院放射科,天津300070

出　　处：《实用放射学杂志》2003年第12期1077-1080,共4页Journal of Practical Radiology

摘　　要：目的　以DSA结果为标准 ,比较 3DTOF、3DPC、3DFSPGR序列及联合运用时对Willis环各组成血管的显示能力。方法　同时进行增强MRA和全脑DSA检查的病人 5 5例 ,对所得的 3DTOF源图像、3DTOFMIP、3DPCMIP、3DFSPGR图像上显示的Willis环组成血管进行判定和联合分析 ,并与DSA结果比较 ,计算各种MRA图像对Willis环组成血管中ACOA、PCOA、P1、A1显示的敏感性、特异性及阴性、阳性预测值。结果　各种评定方法对A1、P1评定的敏感性在 94.12 %以上 ,特异性和阳性预测值均达 10 0 %。对于ACOA、PCOA ,3DTOF源图像、3DFSPGR图像和联合分析结果的敏感性、特异性、阳性预测值和阴性预测值均近似 ;敏感性及阴性预测值均明显高于 3DTOF和 3DPCMIP ,阳性预测值均低于MIP图像。结论　 3DPCMIP ,3DTOF源图像和 /或 3DFSPGR联合可能不仅提高Willis环显示的特异性 ,还可提高其显示的敏感性。Objective To evaluate abilities of 3DTOF, 3DPC and 3D FSPGR sequences and their combination in detecting the components of the circle of Willis based on the results of DSA.Methods Contrast enhanced MRA and DSA were performed in 55 cases.Willis circle showed on all images including 3DPC MIP,3DTOF MIP,3D FSPGR and 3DTOF source images were evaluated respectively and in combination with them were also analysed,based on the results of DSA.The sensitivity, specificity, positive predictive value and negative predictive value of every kind of MRA images were calculated. Results The sensitivity of all MRA sequences and 3D FSPGR in detecting the A1 and P1 segments were all above 94.12%, and their specificity and positive predictive value reached 100%. As to the ACOA and PCOA.There were no obvious difference in sensitivity, specificity, positive predictive and negative predictive value between 3DTOF source images and 3D FSPGR images and the combined evaluation.But sensitivity and negative predictive values were higher and positive predictive values were lower than those of the 3DTOF MIP and 3DPC MIP images. Conclusion Combination of 3DPC MIP, 3DTOF source images and/or 3D FSPGR images after contrast administration not only can show the Willis circle in three dimension but also improve sensitivity, specificity and positive predictive value of visualization of components of the Willis circle.

关 键 词：WILLIS环 3DMRA 3D FSPGR DSA 磁共振血管成像 数字减影血管造影 神经系统症状 

分 类 号：R741[医药卫生—神经病学与精神病学] R445.2[医药卫生—临床医学]