Swensson R G, Hessel S J, Herman P G
Radiology. 1977 Jun;123(3):563-7. doi: 10.1148/123.3.563.
Selected difficult chest radiographs were interpreted by 10 radiologists and then reread in a Focused Search condition that directed readers' attention to film regions containing frequently omitted findings. The percentage of true abnormalities reported at any level of confidence increased from 49.3 to 68.3 between the usual and Focused Search conditions. However, the corresponding percentage of significant false positives also increased from 4.6 to 10.6. The separate ROC curves from each condition could be superimposed and the data fit by a single ROC curve. Thus, the reduced omissions in Focused Search were the result of less stringent criteria for reporting the presence of abnormal findings, rather than an enhanced ability to detect abnormalities. There was no evidence that the original omissions were abnormalities simply overlooked in faulty initial searches.
10位放射科医生对选定的疑难胸部X光片进行解读，然后在“重点搜索”条件下重新阅读，该条件引导读者将注意力集中在包含经常被遗漏的影像区域的胶片上。在常规条件和“重点搜索”条件下，报告的任何置信水平下的真正异常百分比从49.3%增加到了68.3%。然而，相应的显著假阳性百分比也从4.6%增加到了10.6%。每个条件下单独的ROC曲线可以叠加，数据可以用一条单一的ROC曲线拟合。因此，“重点搜索”中遗漏减少是由于报告异常发现存在的标准不那么严格，而不是检测异常能力的提高。没有证据表明最初的遗漏是在错误的初始搜索中被简单忽略的异常。
