| 摘要 |
An x-ray diagnostics installation has an image intensifier video chain with a detector for obtaining an actual value of the brightness of a dominant region within the image at the output screen of the x-ray image intensifier, this actual value being compared with a rated value for controlling the overall brightness of the image. For this purpose, the output image of x-ray image intensifier is directed onto a chip having electrically driveable micromirrors, which can be individually driven, so that by selected individual drive of the micromirrors the individual micromirrors can be oriented as needed to direct a selectable image portion onto a light detector, for use in controlling the brightness.
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