Mertelmeier T
Siemens Medical Engineering Group, Erlangen, Germany.
J Digit Imaging. 1999 Feb;12(1):3-11. doi: 10.1007/BF03168621.
The properties of the human visual system (HVS) relevant to the diagnostic process are described after a brief introduction on the general problems and advantages of using soft copy for primary radiology interpretations. At various spatial and temporal frequencies the contrast sensitivity defines the spatial resolution of the eye-brain system and the sensitivity to flicker. The adaptation to the displayed radiological scene and the ambient illumination determine the dynamic range for the operation of the HVS. Although image display devices are determined mainly by state-of-the-art technology, analysis of the HVS may suggest technical characteristics for electronic displays that will help to optimize the display to the operation of the HVS. These include display size, spatial resolution, contrast resolution, luminance range, and noise, from which further consequences for the technical components of a monitor follow. It is emphasized that routine monitor quality control must be available in clinical practice. These image quality measures must be simple enough to be applied as part of the daily routine. These test instructions might also serve as elements of technical acceptance and constancy tests.
在简要介绍了使用软拷贝进行初级放射学解读的一般问题和优势之后，描述了与诊断过程相关的人类视觉系统（HVS）的特性。在各种空间和时间频率下，对比度敏感度定义了眼脑系统的空间分辨率以及对闪烁的敏感度。对所显示的放射学场景和环境照明的适应决定了HVS运行的动态范围。尽管图像显示设备主要由最先进的技术决定，但对HVS的分析可能会为电子显示器提出技术特性，这将有助于使显示器针对HVS的运行进行优化。这些特性包括显示器尺寸、空间分辨率、对比度分辨率、亮度范围和噪声，由此会对显示器的技术组件产生进一步影响。需要强调的是，临床实践中必须进行常规的显示器质量控制。这些图像质量测量方法必须足够简单，以便能作为日常工作的一部分来应用。这些测试说明也可作为技术验收和稳定性测试的内容。
