SYSTEM OF ABSOLUTE MEASUREMENT FOR RADIOLOGICAL IMAGE LUMINANCE CONTROL

摘要

An inconspicuous system utilizing a photocell (24) is defined for measuring the absolute luminance of a CRT display and the actual effective luminance as would be measured from the viewer's perspective due to additional reflected ambient illuminance in order to enable closed loop adjustment of the display device and to thereby enable luminance quality control, facilitate image perception, and ascertain fidelity of image presentation conveniently over time.