Naganawa S, Senda K, Yamakawa K, Fukatsu H, Ishigaki T, Nakashima T, Sugimoto H, Aoki I, Takai H
Department of Radiology, Nagoya National Hospital.
Nihon Igaku Hoshasen Gakkai Zasshi. 1995 Jan;55(1):81-2.
To evaluate the efficacy of high resolution MR imaging of the inner ear with 3D-Fast spin echo sequence, one volunteer and 12 patients were imaged with a 1.5 T MR scanner. High resolution T2-weighted images were obtained with a head coil in 13 minutes, and the voxel size was 0.39mm x 0.45mm x 1.2mm in most subjects. Original images and maximum intensity projection (MIP) images of the inner ear were evaluated. On original images, the endolymphatic duct was visualized in 72% of subjects, the cochlear aqueduct in 96%, three branches of the cranial nerves in the internal auditory canal in 100%, and flow void of the vessel in the cerebellopontine angle in 100%. On MIP images, more than two cochlear turns were visualized in 92% of subjects, three semicircular canals in 100%, and the anterior and posterior ampulla in 100%. MR imaging of the inner ear with 3D-Fast Spin Echo sequence provides a variety of useful information regarding the anatomy around the inner ear.
为评估采用三维快速自旋回波序列的内耳高分辨率磁共振成像的效能，对1名志愿者和12例患者使用1.5T磁共振扫描仪进行成像。使用头部线圈在13分钟内获得高分辨率T2加权图像，大多数受试者的体素大小为0.39mm×0.45mm×1.2mm。对内耳的原始图像和最大强度投影（MIP）图像进行评估。在原始图像上，72%的受试者可显示内淋巴管，96%可显示蜗水管，100%可显示内耳道内的三支颅神经，100%可显示桥小脑角内血管的流空信号。在MIP图像上，92%的受试者可显示两个以上的蜗旋，100%可显示三个半规管，100%可显示前后壶腹。采用三维快速自旋回波序列的内耳磁共振成像可提供有关内耳周围解剖结构的各种有用信息。
