X-ray generator provided with starting load control
AssigneeU.S. Philips Corporation
InventorHeinz Mester
Life of this patent
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Abstract
In an X-ray generator, different starting powers may be selected and corresponding to each starting power a different reduction instant is measured at which time resistors are inserted into the high-voltage and the filament circuits to reduce power. Different starting powers may be associated with different organ exposures in which case the system has advantages similar to those where the load is reduced in several steps without the high cost.
Claims3
An X-ray generator circuit for an X-ray tube, comprising means for starting the X-ray tube at any selected one of a plurality of different starting powers, all of which are higher than the maximum continuous power at which the X-ray tube may to operated, the load capacity of the X-ray tube limiting to different respective time intervals the maximum period during which the tube should be operated at said different starting powers;
- timing means for measuring said different respective time intervals;
- and switching means responsive to said timing means for automatically reducing the power of the X-ray tube to a suitably lower power when the X-ray tube has been operated at the selected starting power for the time interval associated with the selected starting power.
Dependencies are inferred from the claim text.