X-ray diagnostic installation having a control system for the x-

X-ray or gamma ray systems or devices – Electronic circuit – X-ray source power supply

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378111, 378114, H05G 110

Patent

active

046792180

ABSTRACT:
A control system for the x-ray tube high voltage supply in an x-ray diagnostic installation has a switching device for switching between two circuits for providing an actual value to the high voltage generator for regulating the output thereof. The first circuit determines an actual value from a voltage divider connected to two high voltage generators in series. The other circuit includes radiation detectors, one of which may be filtered, which provide an indication of the radiation quality and are used to modulate an incoming actual value signal. Operation of the switching device is controlled by a ramp generator such that in the range of lower x-ray tube high voltages, which occur immediately after switching on the x-ray tube, control is undertaken on the basis of the actual value of the x-ray tube high voltage through the voltage divider, and upon the attainment of a higher x-ray tube high voltage a switch over occurs such that control of the high voltage is effected by the radiation-detecting circuit.

REFERENCES:
patent: 3631434 (1971-12-01), Schwartz
patent: 3703718 (1972-11-01), Berman
patent: 3765539 (1973-10-01), Bradshaw et al.
patent: 3894235 (1975-07-01), Franke
patent: 4309612 (1982-01-01), Aichinger
patent: 4321594 (1982-03-01), Galvin et al.
patent: 4429224 (1984-01-01), Wagli et al.

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