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Multi energy system for x-ray imaging applications

  • US 5,490,196 A
  • Filed: 03/18/1994
  • Issued: 02/06/1996
  • Est. Priority Date: 03/18/1994
  • Status: Expired due to Term
First Claim
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1. A multi energy system for x-ray imaging applications wherein at least two levels of x-ray energy are produced at different power or x-ray flux levels, comprising a highly stable regulated high voltage supply, two x-ray tubes in series, one x-ray tube having a voltage driven control grid which allows rapid variation of the tube current and generating an x-ray beam, means to expose an object to be inspected to the x-ray beam, a second x-ray tube acting as a non linear resistance controlled by the temperature of its filament, said x-ray tubes electrically connected in series in order to allow the current through said x-ray tubes to vary the voltage applied to the first tube, means for detecting the intensities of x-rays transmitted through the object to be inspected and a means to set up, regulate and maintain the illuminating x-ray energy and flux levels at planned or programmed values.

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