X-ray image intensifier tube persistence.

摘要

As a result of the use of a slow phosphor (16) in the exit screen (15) of an X-ray image intensifier tube (10), a number of image fields can be picked up by means of the comparatively fast television camera (26) during the afterglow of the phosphor. This enables quantum noise integration and, when use is made of a CCD camera (27) upon display, a resolution can be achieved upon display which corresponds to the resolution of a conventional pick-up tube. Moreover, in accordance with the invention it is no longer necessary to use a controllable diaphragm and a complex interface (29) for the asynchronous pick-up and reading of the image information.