Gao P Y
Zhonghua Yi Xue Za Zhi. 1989 Jun;69(6):317-8, 24.
The MRI findings of 6 small acoustic neuromas proved by surgery and pathology were analyzed in detail and compared with CT air cisternography. The MRI features of small acoustic neuromas include that small lesions produce thickening of the nerve or partial or entire filling of the internal auditory canal. In T1-weighted images, the tumor is of higher signal intensity than CSF, but is the same as the brain in T 2-weighted images, the tumor is brighter than the brain. MRI makes possible the diagnosis of small acoustic neuromas without subjecting the patients to invasive procedures or exposing them to X-radiation. Comparing MRI with CT air cisternography, we conclude that MRI is more convenient than CT and causes no postoperative complications.
对6例经手术及病理证实的小型听神经瘤的MRI表现进行了详细分析，并与CT脑池造影进行了比较。小型听神经瘤的MRI特征包括：小病灶可导致神经增粗或内耳道部分或完全被填充。在T1加权图像上，肿瘤信号强度高于脑脊液，但在T2加权图像上与脑实质信号相同，肿瘤比脑实质更亮。MRI无需对患者进行侵入性操作或使其暴露于X射线下，即可诊断小型听神经瘤。将MRI与CT脑池造影相比较，我们得出结论，MRI比CT更方便，且不会引起术后并发症。
