摘要
目的 用受试者操作特征(ROC)曲线评价胸部直接数字化摄影(DR)正位图像及其后处理图像在诊断传染性非典型肺炎(SARS)中的价值。方法 回顾性分析共72例临床诊断或临床疑似SARS患者的首次胸部DR图像。对上述DR图像进行“交响乐”软件后处理得到增强图像。两种图像的诊断结果用Windows95版ROCFIT软件进行ROC分析,使用Microsoft Excel 2000软件绘制ROC曲线图。结果 72例临床诊断或临床疑似病例图像后处理前后的ROC分析显示,后处理前曲线的截距(a值)为0.906 6,斜率(b值)为0.831 0,曲线下面积(Az)为0.757 2;后处理后a值为1.974 5,b值为1.427 5,Az为0.871 4。两种图像诊断的ROC曲线及Az明显不同,两者差异有显著性,(P<0.01)。结论 DR图像后处理可早期检出更多的渗出病灶,有利于临床早期诊断SARS疾病。
Objective To compare the diagnosis value of DR image with and without computer assisted diagnosis (CAD) in patients with SARS. Methods DR imaging studies of 72 patients confirmed or suspected SARS were reviewed retrospectively. All 72 images were strengthened to another picture by a 'symphony' software. ROC analysis was made in the diagnosis result on two kinds of images. Results ROC analysis indicated that there were significant difference ( P < 0.05) between with and without CAD groups with a=1.9745, b= 1.427 5, Az = 0.871 4 on the former and a= 0.906 6, b = 0.831 0, Az= 0.757 2 on the latter. Conclusion CAD is superior to without CAD on detecting more opacity lesion in early SARS dieases, which is helpful to confirmed early SARS.
出处
《广东医学》
CAS
CSCD
2003年第z1期55-58,共4页
Guangdong Medical Journal
