Digital radiography of subtle pulmonary abnormalities: an ROC study of the effect of pixel size on observer performance.
Digital radiography of subtle pulmonary abnormalities: an ROC study of the effect of pixel size on observer performance.
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细微肺部异常的数字放射成像：像素大小对观察者性能影响的 ROC 研究。
DOI：
10.1148/radiology.158.1.3940383
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发表时间：
1986
期刊：
影响因子：
19.7
通讯作者：
Solomon,SL
中科院分区：
文献类型：
--
作者：
MacMahon,H;Vyborny,CJ;Metz,CE;Doi,K;Sabeti,V;Solomon,SL
选择40张有轻度间质浸润性病变和隐匿性气胸的常规X线片和40张正常胸片进行数字化处理，像素大小分别为1.0、0.5、0.2和0.1 mm。使用接收器工作特性分析进行了观测器性能测试。将常规X线片和数字化图像进行比较。结果表明，在这种情况下，随着像素大小的减小，诊断准确率显著提高，至少降低到0.1 mm的水平。我们的结论是，对于使用屏幕-胶片或类似图像接收器的数字系统，使用基本上大于0.1 mm的像素大小可能会导致一些诊断准确性的损失。
Forty conventional radiographs with examples of mild interstitial infiltrates and subtle pneumothoraces and 40 normal studies of the chest were selected and digitized, with pixel sizes of 1.0, 0.5, 0.2, and 0.1 mm. Observer performance tests were carried out using receiver operating characteristic analysis. Conventional radiographs and digitized images were compared. The results indicate that, in such cases, diagnostic accuracy increases significantly as the pixel size is reduced, at least to the 0.1-mm level. We conclude that, for digital systems using screen-film or similar image receptors, use of a pixel size substantially larger than 0.1 mm may result in some loss of diagnostic accuracy.