IMPROVING CRT DISPLAY OF DIGITAL MAMMOGRAMS

这一建议解决了数字乳房X光摄影图像显示的主要问题。全视野数字乳房X光片的矩阵尺寸约为4,000 x 5,000像素，而大多数高性能CRT只能显示2,048 x 2,560像素的图像。特别是，我们希望证明，通过特殊的演示方法，使用现有高性能CRT的数字乳房X光照片的软拷贝演示相当于用于可视化正常乳房X光照片和病理性微钙化的硬拷贝。我们建议开发和测试一种方法，该方法将向乳房X光摄影者呈现两种视图：(1)低空间分辨率视图，其中在CRT监视器上可以看到整个乳房X光图像，并且看起来尽可能类似于胶片，具有应用MTF补偿的选项；以及(2)窗口中的高分辨率视图，乳房X光摄影者可以四处移动，并且具有图像处理选项，将增强微钙化的可见性。我们将在这项研究中使用来自全视野数字探测器的乳房X光照片，并在ROC研究中比较相同数字乳房X光照片的软拷贝显示和硬拷贝显示，这些显示是在激光打印机的帮助下产生的。此外，我们将在一项ROC研究中比较MTF恢复和不恢复的软拷贝显示。使用我们的CRT评估系统，我们将评估将用于该项目的CRT的图像质量，以便找到MTF和其他用于图像增强的相关信息。

This proposal addressed the major problem of image display for digital mammography. The matrix sizes of full field digital mammograms are in the order of 4,000 x 5,000 pixels while most high performance CRTs can display only images with 2,048 x 2,560 pixels. In particular, we wish to demonstrate that with special presentation methods, soft copy presentation of digital mammograms using existing high performance CRTs is equivalent to hard copy for visualizing normal mammograms and pathologic microcalcifications. We are proposing to develop and test a method that will present the mammograms ion two views to the mammographer: (1) a low spatial resolution view where the whole mammogram is seen on the CRT monitor and looking as similar to film as possible, with an option to apply MTF compensation, and (2) a high resolution view in a window, that the mammographer can move around, and having an image processing option, that will enhance the visibility of microcalcifications. We will use mammograms from full field digital detectors for this study and compare in an ROC study soft-copy display with hard-copy display of the same digital mammograms, generated with the aid of a laser printer. In addition we will compare in an ROC study soft copy display with and without MTF restoration. Using our CRT evaluation system we will evaluate the image quality of the CRTs to be used for the project in order to find the MTF and other pertinent information for the image enhancement.