comparison of the commercial color lcd and the medical monochrome lcd using randomized object test patterns比较商业彩色液晶和医疗的单色液晶使用随机对象测试模式.pdfVIP

Comparison of the Commercial Color LCD and the Medical Monochrome LCD Using Randomized Object Test Patterns 1 2 3 4 5 2 1 Jay Wu , Tung H. Wu , Rou P. Han , Shu J. Chang , Cheng T. Shih , Jing Y. Sun , Shih M. Hsu * 1 Department of Biomedical Imaging and Radiological Sciences, College of Health Care, China Medical University, Taichung, Taiwan, Republic of China, 2 Department of Biomedical Imaging and Radiological Sciences, National Yang-Ming University, Taipei City, Taiwan, Republic of China, 3 Department of Management Information Systems, Central Taiwan University of Science and Technology, Taichung, Taiwan, Republic of China, 4 Health Physics Division, Institute of Nuclear Energy Research, Longtan, Taiwan, Republic of China, 5 Department of Biomedical Engineering and Environmental Sciences, National Tsing-Hua University, Hsinchu, Taiwan, Republic of China Abstract Workstations and electronic display devices in a picture archiving and communication system (PACS) provide a convenient and efficient platform for medical diagnosis. The performance of display devices has to be verified to ensure that image quality is not degraded. In this study, we designed a set of randomized object test patterns (ROTPs) consisting of randomly located spheres with various image characteristics to evaluate the performance of a 2.5 mega-pixel (MP) commercial color LCD and a 3 MP diagnostic monochrome LCD in several aspects, including the contrast, resolution, point spread effect, and noise. The ROTPs were then merged into 120 abdominal CT images. Five radiologists were invited to review the CT images, and receiver operating characteristic (ROC) analysis was carried out using a five-point rating scale. In the high background patterns of ROTPs, the sensitivity performa