Detection of subtle microcalcifications: comparison of computed radiography and screen-film mammography.
Detection of subtle microcalcifications: comparison of computed radiography and screen-film mammography.
复制标题
检测细微的微钙化：计算机放射线照相术和屏幕胶片乳房X线照相术的比较。
DOI：
10.1148/radiology.183.2.1561354
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发表时间：
1992
期刊：
影响因子：
19.7
通讯作者：
J. Yamashita
中科院分区：
文献类型：
--
作者：
Y. Higashida;N. Moribe;K. Morita;N. Katsuda;M. Hatemura;T. Takada;M. Takahashi;J. Yamashita
观察员性能测试进行比较的图像处理技术（锐化掩模滤波）的影响，计算机X射线摄影（CR）与存储荧光粉在检测微钙化的诊断准确性。还比较了CR和屏片乳腺X线摄影对微钙化的可检测性。微钙化簇（直径125-250微米）随机叠加在人乳腺标本上。观察员的性能测试进行了受试者工作特征（ROC）分析。ROC曲线下面积和累积真阳性定位分数均用作性能指标。9名观察员的观察性能实验表明，这两种类型的屏幕电影图像提供了更高的检测能力比CR图像。使用反锐化掩模技术后，CR图像上微钙化的可检测性略有改善。然而，在处理和未处理CR图像之间没有发现统计学显著差异，并且可检测性仍然没有达到屏幕-胶片图像所达到的水平。
Observer performance tests were conducted to compare the effects of image-processing technique (unsharp mask filtering) on the diagnostic accuracy of computed radiography (CR) with storage phosphors in the detection of microcalcifications. Comparison of detectability of microcalcifications with CR and with screen-film mammography was also performed. Clusters of microcalcifications (125-250 microns in diameter) were randomly superimposed on human breast specimens. Observer performance tests were carried out with receiver operating characteristic (ROC) analysis. The area under the ROC curve and the cumulative true-positive-localization fraction were both used as indexes of performance. Observer performance experiments with nine observers indicated that the two types of screen-film images used provided higher detectability than the CR images. The detectability of microcalcifications on the CR images improved slightly with use of the unsharp masking technique. However, no statistically significant difference was found between processed and unprocessed CR images, and detectability still did not reach the level achieved with the screen-film images.