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US 4,543,605 AGranted
X-ray examination apparatus
AssigneeU.S. Philips Corporation
InventorLeonardus A. J. Verhoeven
Life of this patent
Estimating the term…
Abstract
In an X-ray image intensifier-television pickup tube apparatus for displaying an image with a small contrast difference, the beam current of the television camera tube can be temporarily increased. As a result, images can be displayed with an increased signal-to-noise ratio. The television camera can then be switched, preferably automatically between this form of image production and the usual production of fluoroscopic images.
Claims11
An X-ray examination apparatus comprising:
- an X-ray image intensifier tube having an output screen for forming a visible image of an object irradiated with X-rays;
- a television camera tube arranged to pick up the visible image formed at the output screen and for generating a video signal representing the visible image, said tube having a beam current;
- and
- means for increasing the beam current of the camera tube during a selected X-ray exposure duration.
1 more element
Dependencies are inferred from the claim text.