House J W, Waluch V, Jackler R K
Ann Otol Rhinol Laryngol. 1986 Jan-Feb;95(1 Pt 1):16-20. doi: 10.1177/000348948609500104.
Magnetic resonance imaging (MRI) is capable of providing excellent images of the contents of the internal auditory canal and cerebellopontine angle. In order to determine whether MRI is comparable to air contrast computed tomography in the diagnosis of small acoustic neuromas, 44 patients with suspected retrocochlear disease were studied with both CT and MRI. Twenty-one lesions were identified successfully with MRI and CT. The size of the tumors ranged from 4 mm to 5 cm. In twenty-three nontumor patients the normal audiovestibular nerve bundles were well visualized. Air contrast CT, on the other hand, was falsely positive in two cases. The results of this study indicate that MRI is suitable as the primary anatomic investigation in patients suspected of having retrocochlear lesions. It has the advantages of being highly reliable as well as free of ionizing radiation and the need for invasive procedures. The expense of MRI compares favorably with that of combined intravenous and gas contrast CT.
磁共振成像（MRI）能够提供内耳道和桥小脑角内容物的优质图像。为了确定MRI在诊断小型听神经瘤方面是否与气脑造影计算机断层扫描相当，对44例疑似蜗后疾病的患者进行了CT和MRI检查。MRI和CT成功识别出21个病变。肿瘤大小从4毫米到5厘米不等。在23例非肿瘤患者中，正常的听前庭神经束清晰可见。另一方面，气脑造影CT在两例中出现假阳性。本研究结果表明，MRI适合作为疑似蜗后病变患者的主要解剖学检查方法。它具有高度可靠、无电离辐射且无需侵入性操作的优点。MRI的费用与静脉注射和气脑造影联合CT的费用相比更具优势。
