应用磁共振血管造影术研究大脑中动脉M1段形态  

Morphological typing of the middle cerebral artery M1 segment by magnetic resonance angiography

作　　者：韩金涛[1] 乔惠婷[2] 李选[1] 李小刚[3] 和清源[4] 董国祥[1] 傅军[1] 栾景源[1] 王昌明[1] 

机构地区：[1]北京大学第三医院介入血管外科,北京100191 [2]北京航空航天大学生物与医学工程学院,北京100191 [3]北京大学第三医院神经内科,北京100191 [4]北京大学第三医院放射科,北京100191

出　　处：《北京大学学报（医学版）》2015年第1期181-185,共5页Journal of Peking University:Health Sciences

基　　金：国家自然科学基金(81101123)资助~~

摘　　要：目的:研究大脑中动脉M1段的空间形态。方法:回顾性分析2011年1月1日至6月30日磁共振血管成像(magnetic resonance angiography,MRA)检查资料,纳入794条大脑中动脉(middle cerebral artery,MCA)(左侧400条,右侧394条),分别分析轴位、后前位和侧位视图中M1段的形态,测量M1段的长度,并分析左、右侧M1段形态的相似性。结果:在轴位、后前位及侧位这三个视图中,MCA M1段在正常人群中的形态分布均表现为C形>L形>S形。在轴位,约373条(47%)MCA M1段表现为C形,其中有340条(42.8%)表现为弓向背侧的C形,仅33条(4.2%)表现为弓向腹侧的C形;在后前位,约322条(40.6%)MCA M1段表现为C形,其中有262条(33.0%)表现为弓向头侧的C形,60条(7.6%)表现为弓向足侧的C形。左、右侧M1段形态相似比例为:轴位27.2%(114/419),后前位42.7%(179/419),后前位M1段形态相似度更高。随着年龄的升高,在轴位视图,L形向C形的转化非常明显,而S形仅有轻度升高;在后前位视图中,L形同时向C形及S形有转化。结论:MCA M1段在轴位及后前位视图中表现为不同的形态,可能参与颅内动脉粥样硬化的发生和发展。Objective： To study the morphology of middle cerebral artery（ MCA） M1 segment. Methods： We selected the MRA data of 794 MCA（ 400 of the left side and 394 of the right side） from January 1,2011 to June 30,2011 consecutively and analyzed the morphology of the MCA M1 segment in axial,anteroposterior and lateral view,measured the length of the M1 segment,and analyzed the similarity of the left and right side M1 segment morphology. Results： In axial,anteroposterior and lateral view,the MCA M1 segment showed C-shape 〉L-shape 〉S-shape. In axial view,it was about 373（ 47%）M1 segment performance for the C-shape,of which 340（ 42. 8%） M1 segments showed bowing to the dorsal side,only 33（ 4. 2%） M1 segments showed bowing to the ventral side. In anteroposterior view,it was about 322（ 40. 6%） M1 segments of the performance of the C-shape,of which 262（ 33. 0%） M1 segments showed a bowing to the superior,60（ 7. 6%） showed bowing to the inferior. The similarity of the left and right MCA M1 segments was 27. 2%（ 114 /419） in axial view and 42. 7%（ 179 /419） in anteroposterior view. It was more similar in anteroposterior view than in axial view. Along with the increase of age,in the axial view,L-shape converted to C-shape very obviously,but only mildly elevated in S-shape. In anteroposterior view,the L-shape converted to the C-shape or S-shape along with the increase of age. Conclusion： The different morphology of MCA M1 segment in axial and anteroposterior view may be involved in the development of intracranial atherosclerosis.

关 键 词：大脑中动脉 解剖学 核磁共振血管造影术 

分 类 号：R322.12[医药卫生—人体解剖和组织胚胎学]