计算机辅助检测系统在检测胸片肺结节中的应用  

The Application of Computer--aided Detection System in Detecting Lung Nodules at Digital Chest Radiography

作　　者：金莉莉[1] 杨光钊[1] 丁晓辉[1] 顾卫根[1] 王志康[1] 章伟敏[1] 

机构地区：[1]浙江大学医学院附属第二医院放射科,浙江杭州310009

出　　处：《实用放射学杂志》2011年第2期266-269,共4页Journal of Practical Radiology

摘　　要：目的探讨计算机辅助检测系统（CAD）在检测肺结节中的应用价值。方法随机选取有胸部CT检查且在前后10d内行胸部后前位片检查的200例患者，由3位不同临床经验的放射科医师分别记录应用CAD前和应用CAD后直径在3～20mm的结节个数，并以CT检查为金标准，对其检出敏感性进行统计学分析。结果CT发现45例80个结节符合直径在3～20mm，CAD准确率51．25％，放射科医师甲、乙、丙在使用CAD前准确率分别为40％、37．5％及26．25％，使用CAD后准确率分别为46．25％、46．25％及30．0％。在直径3～10mm的结节中，CAD发现30个，放射科医师甲、乙、丙在使用CAD前分别发现12、13、7个，各位医师的准确率与CAD间有显著差异（P〈0．05）；使用CAD后，放射科医师对3～20mm结节的准确率无明显提高（P〉O．05）。结论放射科医师应重视CAD提示的小结节，尤其是低年资医师和对直径3～10mm的结节。Objective To evaluate the value of computer--aided detection（CADI system in detecting lung nodules. Methods 200 patients who received chest radiography and CT examinations within 10 days were randomly collected. The images were interpreted independently by three radiologists of different grade and lung nodules with 3-20 mm in diameters were recorded before and after CAD system used, respectively,and the sensitivity in detecting lung nodules was analyzed between with and without CAD based on CT features. Results 80 nodules { 3-20 mm in diameter I in 45 patients were detected by CT. The sensitivity of the CAD system was 51.25~ . For three doctors A , B and C , the detecting rates for nodules of 3-20 mm in diameters without CAD system were 40%, 37.5G and 26.25% and with CAD system were 46.25% ,46.25% and 30.0% ,respectively,there were no significant differences between them. While for the nodules with 3-10 mm in diameters , 30 nodules were detected with CAD, without CAD, 12,13 and 7 noules were found by doctor A,B and C, respectively, the accurate rates and CAD were of significant differences between three radiologists（P〈0. 05）. Conclusion Radiologists should focus on small lung nodules suggested by CAD, especially for the radiologist of low grade in detecting the nodules of 3-10 mm in diameter.

关 键 词：计算机辅助检测 数字化摄影 肺 小结节 

分 类 号：R563[医药卫生—呼吸系统] R814.42[医药卫生—内科学]