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首页> 外文期刊>Journal of Digital Imaging >Observer Study for Evaluating Potential Utility of a Super-High-Resolution LCD in the Detection of Clustered Microcalcifications on Digital Mammograms
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Observer Study for Evaluating Potential Utility of a Super-High-Resolution LCD in the Detection of Clustered Microcalcifications on Digital Mammograms

机译：评估超高分辨率LCD在数字化乳腺X射线照片中检测成簇的微钙化的潜在效用的观察者研究

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We evaluated the potential utility of a newly developed liquid-crystal display (LCD), which used an independent sub-pixel drive (ISD) technique for increasing the spatial resolution of a standard LCD three times in one direction, by use of receiver operating characteristic (ROC) analysis and a two-alternative-forced-choice (2AFC) method to determine improvement in radiologists’ accuracy in the detection of clustered microcalcifications (MCLs) on digital mammograms. We used a standard LCD without and with the ISD technique, which can increase the spatial resolution of the LCD three times in one direction from three mega- to nine megapixels without changes in the size of the display. We used 60 single views of digital mammograms (30 with and 30 without clustered MCLs) for ROC studies and 60 regions of interest (ROIs) with clustered MCLs for 2AFC studies. In the ROC study, seven radiologists attempted to detect clustered MCLs without and with the ISD on the same LCD. In the 2AFC study, the same observer group compared the visibility of MCLs by use of the LCD without and with the ISD. Our institutional review board approved the use of this database and the participation of radiologists in this study. The accuracy in detecting clustered MCLs in the ROC study was improved by use of the LCD with the ISD, but the improvement was not statistically significant (p = 0.08). However, the superiority of the LCD with the ISD was demonstrated as significant (p < 0.001) in the 2AFC study. An LCD with ISD can improve the visibility of clustered MCLs when high-resolution digital mammograms are available.
机译：我们评估了新开发的液晶显示器（LCD）的潜在效用，该液晶显示器使用独立的子像素驱动（ISD）技术通过利用接收器的工作特性在一个方向上将标准LCD的空间分辨率提高了三倍。 （ROC）分析和两选强制选择（2AFC）方法来确定放射线医师在数字化X线乳房X线照片上检测簇状微钙化（MCL）的准确性的提高。我们使用不带ISD技术和带ISD技术的标准LCD，它可以在不改变显示器尺寸的情况下，将LCD的空间分辨率在一个方向上从3兆像素提高到9兆像素三倍。我们对ROC研究使用了60幅数字化乳房X线照片的单视图（30个带有聚类MCL的视图和30个没有聚类MCL的视图），将60个聚类MCL的感兴趣区域（ROI）用于2AFC研究。在ROC研究中，七名放射科医生试图在同一LCD上不使用ISD和使用ISD的情况下检测成簇的MCL。在2AFC研究中，同一观察员小组比较了不带ISD和带ISD的LCD使用MCL的可见性。我们的机构审查委员会批准了该数据库的使用，并同意放射科医生参与这项研究。通过将LCD与ISD一起使用，可提高ROC研究中检测簇状MCL的准确性，但该改善在统计学上并不显着（p = 0.08）。但是，在2AFC研究中，LCD与ISD的优越性被证明是显着的（p <0.001）。具有高分辨率数字乳房X线照片时，带有ISD的LCD可以提高群集MCL的可见性。

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