标准的MRT_1WI和T_2WI不能准确显示后颅窝病变与周围血管、颅神经及内耳的关系。作者对18例桥小脑角肿瘤患者行重度T_2WI以评价其在诊断桥小脑角肿瘤中的作用。18例中,有14例听神经瘤,其中5例小于2cm;另外4例脑膜瘤,有1例小于2cm。重度T_2WI用1.5TMR设备,TR/TE=5082/165ms,层厚2mm,矩阵247×512,视野20cm,影像采集约6min。对照的三维T_1WI GFE MR图像同样 The standard MRT_1WI and T_2WI can not accurately show the relationship between posterior fossa lesions and peripheral blood vessels, cranial nerves and inner ear. The author of 18 patients with cerebellopontine angle cerebri tumor patients with severe T_2WI to evaluate its role in the diagnosis of cerebellopontine angle tumors. Of the 18 patients, 14 had acoustic neuroma, of which 5 were less than 2 cm; the other 4 had meningioma, and 1 had less than 2 cm. Heavy T_2WI with 1.5TMR equipment, TR / TE = 5082 / 165ms, layer thickness 2mm, matrix 247 × 512, field of vision 20cm, image acquisition of about 6min. The same is true for the control 3D T_1 WI GFE MR images