摘要
对比研究ＭＲＩ与ＣＴ对听神经瘤的诊断价值。材料和方法：就５０例手术病理证实听神经瘤患者的术前ＭＲＩ及ＣＴ检查资料，对比观察肿瘤结构（囊变、出血、钙化、肿瘤血管、包膜…）及周围解剖改变（内听道扩大、三叉神经受压、脑干受压移位、四脑室变形…）在两法中的不同显示率及比较两法对病灶定位和定性诊断的不同准确率。结果：ＣＴ对听神经瘤诊断的敏感性（检出率）为８８％，定位、定性诊断准确率均为６８％。ＭＲＩ则分别为９６％、９４％、９４％。在定位和定性诊断中，ＭＲＩ较ＣＴ为好。对病变周围结构改变的观察以及微小听神经瘤的显示，ＭＲＩ优点更为明显。结论：分析了ＭＲＩ和ＣＴ漏、误诊的原因后，认为ＭＲＩ应作为听神经瘤的首选检查方法。
Purpose:The diagnostic evaluation of acoustic neuroma (Schwannoma by the comparative study of MRI and CT scan. Materials and Methods:The MRI and CT scans of 50 surgical pathologic confirmed acoustic neuroma (Schwannoma) cases taken prior the surgical operation were comparatively evaluated by thetumor structure (cystic change, hemorrhage, calcification, tumor vessels, capsule…) and changes of the surroundig anatomy (enlargement of internal acourstic meatus,compression of trigeminal never, displacement of the brain stem, deformation of 4th ventricle…).and also by the different rates in demonstration of the accuracies on localization and property confirmation of lesions. Results: The sensitivity (detection rate), localization, and property determination accuracies of CT and MRI on acoustic neuromas (Schwannoma) were equally 68% for the former and 96%, 94% respectively for the latter. MRI was somewhat better than CT scan on localization and property determination; and even more efficient in demonstrating surrounding sturcture and tiny acoustic neuromas (Schwannoma). Conclusion: After analizing the causes of miss and wrong diagnosis, MRI ought to be the first method of choice for demonstrating the acoustic neuroma. (schwannoma).
出处
《中国医学计算机成像杂志》
CSCD
1995年第2期77-79,共3页
Chinese Computed Medical Imaging
