X=ray video camera appts. for medical use - uses camera tube with grey-scale image intensification provided by avalanche multiplication

摘要

The video camera system uses an X-ray image amplifier (3), as optical transmission system (2) and a video camera (1) with a camera tube which exhibits an intensification function for signals which represent the grey scale values for a visible image. Pref., the camera tube has a photoelectric conversion layer for converting the incident light into a corresponding electrical charge and for providing avalanche multiplication of the charge. The avalanche multiplication factor can be varied by controlling the target voltage of the camera tube. ADVANTAGE - Provides high quality visible image of examined object, with near-uniform grey-scale level for background.