脑回的不对称性MRI研究

目的探讨脑结构MRI扫描图像的不对称性及其意义。方法采用1.5T MRI仪对47名志愿者进行脑组织冠状面断层扫描,对各脑回的面积进行测量,比较左右侧各结构面积差异,并比较不同优势半球脑回结构的面积差异。结果冠状面MRI扫描图像上,左右侧大脑额上回、额中回、额下回面积无明显差异,右侧颞上回面积大于左侧颞上回面积（P〈0.05）,不同优势半球额上回、额中回、额下回面积无明显差异,优势半球颞上回面积大于非优势半球颞上回面积（P〈0.05）。结论大脑脑回在冠状面上结构存在着不对称现象,可能与其功能或某些脑部疾病的解剖学基础有关,揭示大脑空间结构的不均匀性。

Study of the asymmetry phenomenon of cerebral medullary in MRI

Objective To investigate the asymmetry of cerebral medullary substance in MRI scaning image.Methods 47 volunteer were selected and taken scanning with 1.5T MRI in coronal plane,the area of cerebral convolution were measured,and were contrasted between left side and right side,between dominant hemisphere and no dominant hemisphere.Results In MRI image of coronal plane,area of gyrus frontalis superior,gyrus frontalis medius,gyrus frontalis inferior was identical between left side and right side,area of gyrus temporalis superior in right side was bigger than in left side(P < 0.05),area of gyrus frontalis superior,gyrus frontalis medius,gyrus frontalis inferior was identical between dominant hemisphere and no dominant hemisphere,area of gyrus temporalis superior in right was bigger in dominant hemisphere than in no dominant hemisphere(P < 0.05).Conclusion Image of cerebral convolution is asymmetry in coronal plane,which maybe is anatomical foundation of function and disease in pars encephalica.