大脑中央前沟与邻近脑沟毗邻关系的MRI形态学研究

目的:探讨大脑中央前沟与其邻近脑沟毗邻关系的形态学特征。方法:以AC-PC线为扫描基线获取正常成人头颅活体3mm薄层MRI图像,联合应用eFilm Workstation2.1工作站和Adobe Photoshop8.0软件包,横断层面与矢状断面相结合对照观察、定位、标记、描绘,对中央前沟与其邻近脑沟的毗邻关系进行系统的形态学研究。结果:大脑中央前沟与大脑纵裂呈"Y"形相交,MRI显示率为8.33%;大脑中央前沟与额上沟、额中沟及额下沟均呈倒"T"形相交,MRI显示率分别为90.00%、3.33%和76.67%;大脑中央前沟与中央沟有近似平行排列和呈倒"Y"形相交2种情形,MRI显示率分别为83.33%和16.67%;大脑中央前沟与外侧裂呈斜"Y"形相交,MRI显示率为80.00%;大脑中央前沟与外侧裂前升支呈平行排列,MRI显示率为98.33%。结论:大脑中央前沟与邻近脑沟毗邻关系的MRI形态学研究结果可为中央前沟邻近区域病变的定位诊断、立体定向及微创神经外科提供断层影像解剖学依据。

Morphologic relationship between precentral sulcus and its adjacent sulcus on MRI

Objective：To investigate the morphologic relationship between the precentral sulcus（PreCS）and its adjacent sulcus on the axial and sagittal MRI of the brain.Methods：The continuous axial and sagittal MRI based on AC-PC line in 30 normal adult heads were obtained to identify,localize and classify the cerebral PreCS using the eFilm Workstation 2.1 and Adobe Photoshop 8.0 software in the microcomputer.The morphologic relationship between the PreCS and its adjacent sulcus were studied.Results：The PreCS intersected the cerebral longitudinal fissure in the shape of ＂Y＂,and the detection rate of MRI was 8.33%;the PreCS intersected the superior frontal sulcus,the middle frontal sulcus and the inferior frontal sulcus in the shape of inverted ＂Y＂,and the detection rates of MRI were 90.00%,3.33%,and 76.67%,respectively;the PreCS was not only parallel to the central sulcus,but also intersected the CS,and the detection rates of MRI were 83.33% and 16.67%,respectively;the PreCS intersected the lateral fissure in the shape of inclined ＂Y＂,and the detection rate of MRI was 80.00%;the PreCS was parallel to the anterior ascending ramus of lateral fissure,and the detection rate of MRI was 98.33%.Conclusions：The results may provide sectional-imaging anatomical basis for the level diagnosis,stereotactic and minimally invasive neurosurgery in the PreCS neighboring areas.