AAPM/RSNA physics tutorial for residents: technological and psychophysical considerations for digital mammographic displays.
AAPM/RSNA physics tutorial for residents: technological and psychophysical considerations for digital mammographic displays.
复制标题
AAPM/RSNA 住院医师物理教程：数字乳腺 X 线摄影显示的技术和心理物理学考虑因素。
作者：
E. Samei
数字乳房X光检查正在逐步取代屏幕-胶片模拟乳房X光检查，这一转变是由提高乳房X光检查的效率和可能的质量的愿望推动的。数字乳房X光检查涉及使用电子显示设备来显示乳房X光照片。目前，用于显示数字乳房X光照片的电子技术有两种：阴极射线管(CRT)和液晶显示器(LCD)。CRT和LCD设备具有与透光胶片显著不同的成像特性，透光胶片通常用于显示模拟乳房X光照片。因此，向数字乳房X光检查过渡需要考虑与有效显示乳房X光检查有关的一些心理物理因素。这些因素中的一些与显示设备的特定性能特性有关，而另一些与人类视觉系统的固有特性有关。影响医学图像判读的主要心理物理因素是对比度、分辨率和噪声。通过将这些因素考虑在内并通过使用省时、直观和特定于读者的用户界面来实现乳房X光照片的最佳显示。由于显示设备容易受到硬件和校准的变化以及随着时间的推移而降级的影响，因此验收测试和质量控制测试对于保持足够的显示质量水平是必要的。
Digital mammography is gradually replacing screen-film analog mammography, a transition driven by a desire to improve the efficiency and possibly the quality of the interpretation of mammograms. Digital mammography involves the use of electronic display devices to display the mammograms. Currently, two electronic technologies are used to display digital mammograms: the cathode-ray tube (CRT) and liquid crystal display (LCD). CRT and LCD devices have imaging characteristics markedly different from those of transilluminated film, which has conventionally been used to display analog mammograms. Consequently, the transition to digital mammography necessitates consideration of a number of psychophysical factors pertaining to effective display of mammograms. Some of these factors are related to specific performance characteristics of the display devices, whereas others are related to inherent characteristics of the human visual system. The main psychophysical factors that affect the interpretation of medical images are contrast, resolution, and noise. Optimal display of mammograms is achieved by taking these factors into consideration and by using time-efficient, intuitive, and reader-specific user interfaces. Because display devices are susceptible to variations in hardware and calibration and to degradation over time, acceptance testing and quality control testing are necessary to maintain an adequate level of display quality.