シネ撮影装置のCRTモニタの輝度測定

抄録

Quality control of CRT (cathode ray tube) monitors is essential to the good management of cineradiographic systems. In this study, we developed a new video signal generator and measured the output luminance of 35 systems in our five institutes. The results were as follows : 1. Our video signal generator (VG-812) may be useful in quantitatively analyzing the luminance of CRT monitors. 2. There were large differences in luminance among CRT monitors in the clinical setting. The gradient of the video signal-luminance curve ranged between 1.38 and 2.91. The coefficient of variation ranged from 8% to 22%. 3. The life of CRT monitors may be indicated by periodically measuring the declline curve of luminance under the usual setting and the maximum contrast value, using the video signal generator.