X-ray tube preheat control
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United States of America Patent
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Mar 21, 2006
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N/A
app pub date -
Mar 12, 2003
filing date -
Mar 12, 2003
priority date (Note) -
Expired
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Abstract
A current feedback circuit in a dental imaging apparatus, which measures the x-ray tube current produced by the x-ray filament. During preheat, when the tube current is sensed to be appropriate for production of a constant rate of electrons, preheat is stopped, and diagnostic radiation emission begins. This circuit eliminates a fixed amount of preheat pulses which contribute unusable radiation during preheat of the filament in prior art systems.
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