摘要
目的:评价计算机辅助检测系统(CAD)对肺内单发结节的诊断价值。方法:从受检病人中随机抽取150例肺部直径约9～30mm单发结节的病例为试验组。所有肺结节病灶均经病理证实。另从健康体检人群中随机抽取150个年龄、性别构成与受检组相仿的病例作为对照组。两组胸片均经CT证实,并由多位放射学专家共同诊断。所有胸片均通过数字化放射成像(DR)获得。由5位高年资影像诊断医生和5位低年资影像诊断医生作为观测者分别对不用和用CAD输出图像的胸片进行诊断。观察者积分用受试者操作特性(ROC)曲线分析来衡量。结果:平均ROC曲线下面积从不用CAD输出图像的0.766到用CAD输出图像的0.833,两者有统计学显著性差异(P<0.05)。在使用CAD输出图像时,低年资影像诊断医生比高年资影像诊断医生的平均ROC曲线下面积增加的更多。结论:运用DR所配置的CAD系统能帮助影像诊断医生提高对肺结节性病灶的检出率。
Objective： To determine the effect of computer aided detection（CAD） system on the diagnosis of pulmonary nodules. Methods： One hundred and fifty cases with solitary lung nodules up to 9-30mm in diameter were examined. All nodules had been verified by means of biopsy. One hundred and fifty cases of healthy individuals were selected as control group on the basis of chest CT. All chest radiographs in the two groups were obtained with a digital radiography system. Five experienced chest radiologists and five residents detected the chest radiograph with or without CAD output images. The scales of performance was evaluated with receiver operating characteristic analysis. Result： The average area under the curve value increased significantly from 0.766 without CAD to 0.833 with CAD output images. Individually, the use of CAD output images was more useful to radiology residents than to experienced radiologist. Conclusion＂ This CAD system for digital radiograph can assist radiologist and has the potential to improve the detection of lung nodules.
出处
《中国临床医学影像杂志》
CAS
北大核心
2006年第3期148-150,153,共4页
Journal of China Clinic Medical Imaging
关键词
硬币病变
肺
图像处理
计算机辅助
coin lesion, pulmonary
image processing, computer-assisted
