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橄榄桥脑小脑萎缩(OPCA)是一种原因未明的神经系统变性疾病。本病的病理解剖资料较少,CT对本病的形态学诊断有较大帮助,但受其性能限制仍不能令人满意。MRI以其卓越性能,为本病形态学改变提供最佳医学影像,显示出超乎寻常的优越性。作者结合1989～1992年对3例OPCA患者的MRI正中矢状断面之脑干、小脑和上颈髓各部位的测量,讨论本病的MRI诊断。资料与方法一、选MRI正中矢状断面图像,分别进行下述各条径线的线性测量。 A 中脑大脑脚前缘与导水管中间距 B 桥脑中点前缘与第四脑室底间距 c 桥脑延髓移行部之延髓最短前后径 D 延髓脊髓移行部之延髓前后径 E 第四脑室顶点与小脑后缘间前后径 F 小脑最长长轴距离
Olive pontine cerebellar atrophy (OPCA) is an unexplained neurodegenerative disease. Pathological anatomy of the disease less information on the morphological diagnosis of this disease have a greater help, but its performance is still not satisfactory. With its superior performance, MRI provides the best medical images of the morphological changes of the disease, showing extraordinary superiority. The authors combined the 1989 ~ 1992 on 3 cases of OPCA patients with MRI sagittal section of the brain stem, cerebellum and various parts of the upper cervical spinal cord to discuss the MRI diagnosis of this disease. Materials and methods First, select MRI median sagittal section images, respectively, for the following linear measurement of each line. A middle cerebral artery brain anteroposterior and aqueduct in the middle of the distance between the midpoint of the pontine midpoint and the fourth ventricle spacing c medulla oblongata of the medullary remodeling of the shortest anterior and posterior diameter of the medulla oblongata medulla oblongata forward and backward diameter E fourth cerebral ventricle And the cerebellum between the anteroposterior diameter of F cerebellum longest long axis distance