Differential use of image enhancement techniques by experienced and inexperienced observers.
Differential use of image enhancement techniques by experienced and inexperienced observers.
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经验丰富和缺乏经验的观察者对图像增强技术的不同使用。
DOI：
10.1007/s10278-005-7666-z
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
Fan,Jiahua
中科院分区：
文献类型：
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作者：
Krupinski,ElizabethA;Roehrig,Hans;Dallas,William;Fan,Jiahua
全视野数字乳腺X射线摄影（FFDM）系统目前正用于以数字格式采集乳腺X射线照片，但与传统的胶片屏幕显示相比，数字显示并不理想。软拷贝显示的某些物理属性[例如，调制传递函数（MTF）]与胶片相比不是最佳的。我们开发的方法，以弥补这些软拷贝显示的缺陷，仔细的物理特性的显示器和图像处理软件的基础上。一系列的100个FFDM和60个数字化图像显示给六个不同的人-一半有经验的（乳房摄影师）和一半没有经验的（放射科住院医师）。观察者必须决定是否存在肿块或微钙化簇，并将其分类为良性或恶性。可以激活窗口，使窗口内的图像细节达到全分辨率，并针对阴极射线管（CRT）显示器的各向异性MTF进行校正。有经验的阅片者具有更好的诊断性能，并且花费更少的时间查看图像。有经验的读者使用窗口/水平比没有经验的读者，但没有经验的读者使用放大倍率和MTF补偿工具更频繁。使用放大倍率和MTF工具增加了读片者的决策信心。有经验的读者和没有经验的读者使用图像处理工具的方式不同，某些工具可以增加读者的信心。了解观察者如何使用图像处理工具可能有助于开发更好和更自动化的用户界面。
Full-field digital mammography (FFDM) systems are currently being used to acquire mammograms in digital format, but digital displays are less than ideal compared to traditional film-screen display. Certain physical properties of softcopy displays [e.g., modulation transfer function (MTF)] are less than optimal compared to film. We developed methods to compensate for some of these softcopy display deficiencies, based on careful physical characterization of the displays and image-processing software. A series of 100 FFDM and 60 digitized images was shown to six observers—half experienced (mammographers) and half inexperienced (radiology residents). The observers had to decide if a mass or microcalcification cluster was present and classify it as benign or malignant. A window could be activated that brought the image detail within the window to full resolution and corrected for the nonisotropic MTF of the Cathode Ray Tube (CRT) display. Experienced readers had better diagnostic performance and took less time to view the images. Experienced readers used window/level more than inexperienced readers, but inexperienced readers used magnification and the MTF compensation tool more often. Use of the magnification and the MTF tool increased reader decision confidence. Experienced and inexperienced readers use image-processing tools differently, with certain tools increasing reader confidence. Understanding how observers use image-processing tools may help in the development of better and more automated user interfaces.