THE CEREBELLUM IN SAGITTAL PLANE - ANATOMIC-MR CORRELATION .1. THE VERMIS
THE CEREBELLUM IN SAGITTAL PLANE - ANATOMIC-MR CORRELATION .1. THE VERMIS
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DOI：
10.2214/ajr.153.4.829
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发表时间：
1989-10-01
影响因子：
5
通讯作者：
HESSELINK, JR
中科院分区：
文献类型：
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作者：
COURCHESNE, E;PRESS, GA;HESSELINK, JR
3个脑部标本和11名正常志愿者的5毫米矢状高场（1.5 t）薄MR图像与人类小脑皮层和半球切片的相关性表明，质子密度加权（长TR/短TE）和t2加权（长TR/长TE）自旋回波脉冲序列提供了灰质和白质之间最大的对比。这些图像还可以显示(1)髓质和初级白质分支到蚓小叶，包括舌部、中央部、culmen、declive、叶、块茎、锥体、小舌和结节；(2)在小叶内的几个较细的次枝到单个叶。蚓部的表面特征，包括较深的裂缝（如尖顶前、原发性、水平和椎体前）和较浅的沟，最好通过t1加权（短TR/短TE）和t2加权图像来描绘，这些图像提供了脑脊液和实质之间最大的对比。考虑到我们的志愿者正常蚓的宽度从6毫米到12毫米不等，获取薄切片（. 1）是必要的。在中线矢状面MR切片上，需要5mm)来最小化小脑半球与蚓部的平均体积。了解矢状面MR图像上小脑蚓部的详细正常解剖结构有助于识别各种病理改变。
Correlation of thin (5-mm) sagittal high-field (1.5-T) MR images of three brain specimens and 11 normal volunteers with microtome sections of the human cerebellar vermis and hemispheres demonstrates that proton-density-weighted (long TR/short TE) and T2-weighted (long TR/long TE) spin-echo pulse sequences provide the greatest contrast between gray and white matter. These images also can display (1) the corpus medullare and primary white-matter branches to the vermian lobules, including the lingula, centralis, culmen, declive, folium, tuber, pyramis, uvula, and nodulus; and (2) several finer secondary branches to individual folia within the lobules. Surface features of the vermis including the deeper fissures (e.g., preculminate, primary, horizontal, and prepyramidal) and shallower sulci are best delineated by T1-weighted (short TR/short TE) and T2-weighted images, which provide greatest contrast between CSF and parenchyma. Given that the width of the normal vermis varied from 6 to 12 mm in our volunteers, the acquisition of thin slices (.ltoreq. 5 mm) was required to minimize volume averging of the cerebellar hemispheres with the vermis on a midline sagittal MR section. Knowledge of the detailed normal anatomy of the cerebellar vermis on sagittal MR images can assist in the identification of various pathologic alterations.