Takehara Y, Ichijo K, Tohyama N, Kodaira N, Seki A, Adachi M, Ueda H, Mochizuki T, Naito M, Nishimura T
Department of Radiology, Seirei Mikatabera General Hospital.
Nihon Igaku Hoshasen Gakkai Zasshi. 1993 Jul 25;53(7):859-61.
Excellent quality of MR cisternography was acquired using "long echo train length fast spin echo sequence" (TR/TE = 2666/200, ETL = 24, 6 or 8 NEX, 3 mm thickness, 0 mm interslice gap, 19 cm FOV, 512 * 384, 2 DFT method). The inner ear anatomy such as canaliculus cochleae or lamina spiralis ossea were well visualized. The VII, VIII th nerve bundles within the internal auditory canal were detectable as 1 to 4 bundles. The vessels in the cerebellopontine angle or the internal auditory canal were also demarcated from the VII, VIII th nerve bundles because of their flow void. Signal to noise ratio seemed to be better than 3 DFT method, however limited spatial resolution in the cranio-caudal direction might require additional sagittal or coronal scan.
使用“长回波链快速自旋回波序列”（TR/TE = 2666/200，ETL = 24，6或8次激励，层厚3 mm，层间距0 mm，视野19 cm，512 * 384，二维傅里叶变换方法）获得了高质量的磁共振水成像。内耳解剖结构如蜗小管或骨螺旋板清晰可见。内听道内的第VII、VIII对神经束可检测为1至4束。由于其流空效应，桥小脑角或内听道内的血管也与第VII、VIII对神经束区分开来。信噪比似乎优于三维傅里叶变换方法，然而在颅尾方向有限的空间分辨率可能需要额外的矢状位或冠状位扫描。
