| 摘要 |
An x-radiator has a housing filled with electrically insulating fluid and having a radiation exit window, an x-ray tube disposed in the housing surrounded by the fluid and directing x-radiation through the exit window. During operation, the x-ray tube generates heat, causing an increase in pressure of the fluid in the housing. A protection circuit is provided which discontinues operation of the x-ray tube when the pressure of the fluid in the housing reaches a limit value. In order to prevent the protection circuit from unexpectedly discontinuing operation of the x-ray tube during a patient examination, the x-radiator also includes a warning circuit which generates a signal when the pressure of the fluid in the housing reaches a threshold level, the threshold level being below the limit value.
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