成人听力下降的CT和MRI

目的：采用HRCT和MRI探讨导致成人听力下降的病变发生率并分析比较HRCT和MRI显示这些病变的能力。方法：分析7254例成人听力下降患者的HRCT和MRI资料,统计HRCT和MRI显示病变的阳性率及各种病变的构成比,并比较HRCT和MRI以及不同序列和断面对病变的显示情况。结果：7254例患者中HRCT和MRI发现病变者共5198例,阳性率为71.66%。其中HRCT显示病变的阳性率为75.66%,MRI显示病变的阳性率为37.98%,同时行HRCT和MRI显示病变的阳性率为74.09%。原发病因以化脓性中耳炎最多见,占79.28%;颞骨先天性畸形、外伤、听神经瘤、耳硬化症、迷路动脉压迫前庭蜗神经、肿瘤与肿瘤样病变及骨化性迷路炎分别占8.47%、3.38%、2.35%、2.31%、2.17%、1.31%和0.73%。MR内耳水成像显示前庭蜗神经缺如优于横轴面T2WI（P=0.008）和冠状面T2WI（P=0.006）,显示迷路动脉压迫前庭蜗神经优于横轴面T2WI（P=0.002）和冠状面T2WI（P〈0.001）,显示骨化性迷路炎优于HRCT（P=0.012）和增强后T1WI（P=0.002）。结论：中耳炎是成人听力下降的最常见原因,HRCT显示最佳,而MRI尤其是内耳水成像显示蜗后病变最佳,规范HRCT和MRI检查流程和方法可提高病变显示率。

CT and MRI in detection of diseases causing hearing loss in adult

Objective:To study the common causes of hearing loss in adults using HRCT and MRI,and to compare the competence of these two imaging techniques in revealing diseases.Methods:HRCT and MRI findings of 7254 adult patients with hearing loss were retrospectively analyzed.The percentage of each disease causing hearing loss and the positive rates of HRCT and MRI were computed.Comparisons of the efficacy in revealing diseases with CT,MRI,and different sequences and sections were undertaken.Results:The total positiv...