Shandong University, Shandong Medical Imaging Research Institute, CT Room, 324, Jingwu Road, Jinan, Shandong, PR China.
Eur J Radiol. 2010 Jul;75(1):57-63. doi: 10.1016/j.ejrad.2009.03.036. Epub 2009 Apr 22.
To evaluate the detailed anatomic features, neurovascular relationships of the cisternal segment of the posterior group of cranial nerves (PGCN: IX, X, XI, XII); to evaluate the utility of magnetic resonance (MR) in demonstrating the PGCN with disorders caused by abnormal compression related to artery or tumor.
A total of 59 volunteers, 12 patients with abnormal symptom in the PGCN underwent three-dimensional (3D) Fourier transformation constructive interference in steady-state (CISS) MR imaging, and 22 of these volunteers and 12 patients also underwent MR angiography in which a time-of-flight (TOF) sequence was used to further distinguish the PGCN from the adjacent blood vessels. Anatomical features, neurovascular relationships of the PGCN in 59 volunteers and abnormal changes in 12 patients caused by neurovascular compression or tumor were observed from multi-planar reconstruction (MPR) images, cryomicrotome section and 3D-CISS MR imaging of cranial cadaver were used to testify the PGCN displayed in 59 volunteers.
3D-CISS MR imaging depicted the proximal cisternal segment of the cranial nerves complex (CN IX, X, XI) at the oblique axial, sagittal planes in 100% (118/118), 99% (117/118) of 118 sides; CNXII in the oblique axial, sagittal planes in 90% (106/118), 91% (107/118) of 118 sides. At the sagittal planes, the CN IX, X, XI were found parallel to each other in the cisternal segment in 45.2% (53/117) of 117 sides, gathering into a bundle of nerves complex before entering the jugular foramen (JF) in 54.7% (64/117) of 117 sides. VAs were blood vessels more often identified, they were found to be in contact with the PGCN in 28.0% (33/118) of 118 sides, and not in contact in 72.0% (85/118) of 118 sides. 3D-CISS MR imaging of volunteers revealed the similar result corresponding to cryomicrotome section and 3D-CISS MR imaging of cranial cadaver. Twelve patients with abnormal changes in the PGCN were all displayed well, among them 8 were pressed by arteries, 1 by arachnoid cyst, and 3 caused by tumors.
Use of 3D-CISS sequence enables accurate identification of the cisternal segment of the PGCN, neurovascular relationships and abnormal changes caused by neurovascular compression or tumor.
评估颅神经后组（IX、X、XI、XII 脑神经）池段的详细解剖学特征和神经血管关系；评估磁共振（MR）在显示因动脉或肿瘤异常压迫引起的颅神经后组疾病中的作用。
共 59 名志愿者，12 名颅神经后组有异常症状的患者进行了三维（3D）傅立叶转换稳态构建干涉（CISS）MR 成像，其中 22 名志愿者和 12 名患者还进行了磁共振血管造影（MRA），采用时间飞跃（TOF）序列进一步区分颅神经后组与相邻血管。从多平面重建（MPR）图像观察 59 名志愿者中颅神经后组的神经血管关系，观察 12 名患者因神经血管压迫或肿瘤引起的异常变化。利用头颅冷冻切片和 3D-CISS MR 成像来验证志愿者中显示的颅神经后组。
3D-CISS MR 成像在斜轴矢状面、矢状面分别显示 118 侧颅神经复合体（IX、X、XI 脑神经）近池段 100%（118/118）、99%（117/118）；118 侧 CNXII 神经在斜轴矢状面分别显示 90%（106/118）、91%（107/118）。在矢状面，117 侧颅神经后组中，45.2%（53/117）的神经 IX、X、XI 在池段彼此平行，54.7%（64/117）的神经进入颈静脉孔（JF）前聚集为一束神经复合体。VA 是更常见的血管，在 118 侧中有 28.0%（33/118）的血管与颅神经后组接触，72.0%（85/118）的血管不接触。志愿者的 3D-CISS MR 成像结果与冷冻切片和头颅冷冻切片的 3D-CISS MR 成像结果相似。12 例颅神经后组异常改变的患者均显示良好，其中 8 例由动脉压迫，1 例由蛛网膜囊肿压迫，3 例由肿瘤引起。
使用 3D-CISS 序列可以准确识别颅神经后组的池段、神经血管关系以及由神经血管压迫或肿瘤引起的异常变化。
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