纵隔淋巴结肿大CT和X线诊断比较的ROC曲线分析  

A Roc Analysis of Mediastinum Lymph Node Enlargement Detected by CT and X-Ray

作　　者：魏玮[1] 李康[1] 刘炳环[1] 葛虹[1] 

机构地区：[1]哈尔滨医科大学附属一院放射影像教研室CT室,哈医大公卫学院统计学教研室,哈工业大学数理统计教研室

出　　处：《临床医学影像杂志》1994年第4期189-190,共2页

摘　　要：伴随影像诊断设备临床应用的不断扩展．比较影像学成为影像诊断的一部分重要内容。本文经过处理一组纵隔淋巴结肿大的Ｘ线及ＣＴ片观察结果，揭示了比较影像定量分析的可行性。现将ＲＯＣ曲线及曲线下面积作一介绍。运用ＲＯＣ曲线分析，ＣＴ观察纵隔淋巴结肿大的敏感性和特异性均高于Ｘ线平片。ＲＯＣ曲线下面积计算，ＣＴ为０．９４．Ｘ线为０．８。Abstract Comparing image analysis treated by suitable statistic method now has become more important than any time,because of the development of modern equipments for diagnosis.PeoPle have thought with a long experience that CT is superior to X-Ray at detecting mediastinum lymph node,but it seemed lack of a scientific and synthetic date to compare.This paper made it possible through 200 cases who were suspected as disorders in mediastinum lymph node.Together we introduce a new statistic method in this study called ROC and area under ROC cutve.ITshow us the possibility of quantitative analysis in comparing image.Through this analysis we conclude that CT is really better both in sensitivity and specility.The area under Roc. CT is 0.94,X-Ray is 0.87.

关 键 词：纵隔 淋巴结肿大 CT ROC曲线 X线诊断 

分 类 号：R816.4[医药卫生—放射医学]