| 摘要 |
An X-ray diagnostic installation in which there is effectuated an automatic proportioning of the exposure time. In the dental X-ray exposure installation, a ray detector is applied to the pouch, which delivers an electrical signal in conformance with the ray intensity when it is impinged upon by X-radiation, and which is interconnected with the setting means to an automatic exposure timer in such a manner whereby the exposure time is determined by an output signal of the ray detector for the purpose of effectuating an optimum degree of film darkening.
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