磁共振信号强度在胸膜疾病中的诊断意义  

The Significance of MR Signal Intensity in Pleural Diseases

作　　者：韩艺东[1] 李茂进[1] 林怡蔼[1] 郭玉鑫[1] 章志霖[1] 

机构地区：[1]湖北医科大学第一临床学院放射科,湖北武汉430060

出　　处：《实用放射学杂志》2000年第5期285-288,共4页Journal of Practical Radiology

摘　　要：目的 :评价磁共振信号强度在胸膜疾病中的诊断价值。方法 :48例不同胸膜疾病病人在 Philips0 .5 T扫描仪下行 MR检查。成像常规为 T1 WI、T2 WI快速自旋回波扫描 ,所有病例均在病理证实结合临床资料下得出恶性或良性胸膜疾病的诊断。恶性疾病包括胸膜间皮瘤 ( n=10 )、胸膜转移瘤 ( n=18) ,良性疾病包括结核性胸膜炎 ( n=9)、胸膜肥厚 ( n=7)、纤维胸 ( n=1)、脓胸 ( n=2 )和胸膜炎性假瘤 ( n=1)。将各种胸膜疾病 T1 WI、T2 WI上绝对信号强度 ( ASI) ,病灶信号与肌肉信号的对比噪声比 ( CNR) ,信号强度比 ( SIR)分别进行测量或计算 ,判断它们在良、恶性胸膜疾病之间 ,胸膜间皮瘤与胸膜转移瘤之间是否存在差别。结果 :ASI在良、恶性胸膜疾病之间 ,胸膜间皮瘤与转移瘤之间均无显著差异 ,CNR在良、恶性胸膜疾病之间于 T2 WI上有差别 ( P<0 .0 1) ,而SIR在良、恶性胸膜疾病之间于 T1 WI、T2 WI上均有极显著差异 ( P<0 .0 0 1) ,同时 ,还在胸膜间皮瘤与转移瘤之间于 T2 WI上存在差别 ( P<0 .0 5 )。结论 :磁共振信号强度在胸膜疾病鉴别诊断中有重要意义 ,其中 SIR最具有诊断价值。MR信号强度在 T2 WI上比T1Objective:To evaluate the value of MR signal intensity in pleural diseases.Methods:Fourty-eight patients with different pleural lesions were examined by MR imaging at 0.5 T Philips gyroscan scanner.T -weighted and T 2-weighted turbo spin echo images was obtained.A final diagnosis of malignant(n=28)or benign(n=20)pleural disease was established and confirmed by surgery,pathology and clinical data.The malignant diseases included mesothelioma(n=10)and the pleural matastatic carcinoma(n=18).The benign disease included tuberculosis pleurisitis(n=9),pleural thickening(n=7),fibrothorax(n=1),empyema(n=2)and pleural inflammatory pseudotumor(n=1).Their MR absolute signal intensity(ASI)on T 1WI,T 2WI were measured.The contrast to noise ratio(CNR)and the signal intensity ratio(SIR)of the lesions to muscles was computed.Then we observe whether they were different or not between malignant group and benign group,and between mesothelioma group and matastatic cacinoma group.Results:The ASI of lesions was of no significant difference among any group.The CNR was of significant difference between benign and malignant group on T 2WI(P<0.01);there was significant difference in SIR between benign and malignant group both on T 1WI and T 2WI(P<0.001)Furthermore,it was also of significant difference between mesothelioma and matastatic lesion on T 2WI(P<0.05).Conclusion:MR signal intensity is of important significance in differentiating pleural diseases,SIR is the most useful one.T 2WI plays more important role than T 1WI does in differentiating pleural disease by MR signal intensity. [

关 键 词：磁共振成像 信号强度 胸膜疾病 

分 类 号：R561.04[医药卫生—呼吸系统] R445.2[医药卫生—内科学]