CAJ | 학술논문

目的：探讨大脑中动脉动脉瘤（MCAA）的容积CT数字减影血管成像（VCTDSA）的部位特征。方法回顾性分析2009年5月至2011年1月69例72个MCAA VCTDSA影像特点，根据MCAA发生部位分为4类：M1段，M2分叉处，M2远段，M3～M5段，统计双侧动脉瘤数目，分析动脉瘤部位的影像学特征；两名神经放射学医生采用双盲法测量M2分叉处大脑中动脉瘤角度，并与正常大脑中动脉M2分叉处角度对照，统计分析二者的角度差异。结果（1）M1段动脉瘤共7个（9．70％），M2分叉处动脉瘤共58个（80．56％），M 2远段动脉瘤共5个（6．94％），M 3～M 5段动脉瘤共2个（2．78％）。（2）正常大脑中动脉M 2分叉处角度为（99．30±22．96）°，M 2分叉处动脉瘤角度为（139．26±27．61）°，两者比较差异有统计学意义（ P＜0．01）。（3）正常大脑中动脉M 2分叉处角度左右侧比较差异无统计学意义（ P＞0．05）。（4）破裂动脉瘤M 2分叉处角度为（133．98±30．24）°，未破裂动脉瘤M2分叉处角度为（144．53±21．81）°，两者比较差异无统计学意义（P＞0．05）。结论 MCAA多发于M2分叉处；动脉瘤组与非动脉瘤组M2分叉处角度差异有统计学意义，M2分叉角度增大，动脉瘤的发生率增高。
목적：탐토대뇌중동맥동맥류（MCAA）적용적CT수자감영혈관성상（VCTDSA）적부위특정。방법회고성분석2009년5월지2011년1월69례72개MCAA VCTDSA영상특점，근거MCAA발생부위분위4류：M1단，M2분차처，M2원단，M3～M5단，통계쌍측동맥류수목，분석동맥류부위적영상학특정；량명신경방사학의생채용쌍맹법측량M2분차처대뇌중동맥류각도，병여정상대뇌중동맥M2분차처각도대조，통계분석이자적각도차이。결과（1）M1단동맥류공7개（9．70％），M2분차처동맥류공58개（80．56％），M 2원단동맥류공5개（6．94％），M 3～M 5단동맥류공2개（2．78％）。（2）정상대뇌중동맥M 2분차처각도위（99．30±22．96）°，M 2분차처동맥류각도위（139．26±27．61）°，량자비교차이유통계학의의（ P＜0．01）。（3）정상대뇌중동맥M 2분차처각도좌우측비교차이무통계학의의（ P＞0．05）。（4）파렬동맥류M 2분차처각도위（133．98±30．24）°，미파렬동맥류M2분차처각도위（144．53±21．81）°，량자비교차이무통계학의의（P＞0．05）。결론 MCAA다발우M2분차처；동맥류조여비동맥류조M2분차처각도차이유통계학의의，M2분차각도증대，동맥류적발생솔증고。
Objective To study the occurrence site characteristics of middle cerebral artery aneurysm (MCAA ) in volume CT digital subtraction angiograhy(VCTDSA) .Methods The image characteristics in 72 cases of MCAA from May 2009 to January 2011 were retrospectively analyzed ,according to the running of middle cerebral artery ,the occurrence sites of aneurysm were divided into four categories :M1 segment ,M2 bifurcation ,M2 distal and M3-M5 segment ,the aneurysm number was conducted the statistics and the image characteristics were analyzed ;two neuroradiologists adopted the double-blind method to measure the MCAA angle in bifurcation of M2 segment and compared it with the bifurcation angle in the normal middle cerebral artery ,the difference between them were statistically analyzed .Results (1)M1 segment aneurysms were 7 cases(9 .70% ) ,M2 bifurcation aneurysms were 58 ca-ses(80 .56% ) ,M2 distal aneurysms were 5 cases(6 .94% ) and M3-M5 segment aneurysms were 2 cases(2 .78% ) .(2)The angle in M2 bifurcation of the normal middle cerebral artery was(99 .30 ± 22 .96)° ,M2 bifurcation aneurysm angle was(139 .26 ± 27 .61)° , the difference between them showing statistical significance (P<0 .01) .(3)The difference between left and right of M 2 bifurcation angle in the normal middle cerebral artery had no statistical significance (P>0 .05) .(4)The M2 bifurcation angle in ruptured aneu-rysm was(133 .98 ± 30 .24)° ,which in unruptured aneurysms was(144 .53 ± 21 .81)° ,the difference between them had no statistical significance(P>0 .05) .Conclusion MCAA mainly occurred in M2 bifurcation .There is significant difference in M2 bifurcation an-gle between the aneurysm group and non-aneurysm group ,M2 bifurcation angle is increased ,the probability of aneurysm occurrence is increased .