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Method and apparatus for generation of a digital x-ray image of an examination subject

  • US 7,342,999 B2
  • Filed: 08/03/2006
  • Issued: 03/11/2008
  • Est. Priority Date: 08/03/2005
  • Status: Active Grant
First Claim
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1. A method for generating a digital x-ray image of an examination subject, comprising the steps of:

  • determining a preliminary total x-ray radiation dose that is estimated, based on knowledge of the examination subject, to be necessary for obtaining a diagnostic image of an examination subject;

    irradiating the examination subject with a partial dose of x-rays from an x-ray tube, that is less than said preliminary total dose, and detecting said x-rays attenuated by the examination subject with a digital x-ray detector to obtain a pre-image of the examination subject;

    evaluating said pre-image to determine a remaining radiation dose, that has no fixed relation to said preliminary total dose, needed to produce the diagnostic image of the subject;

    irradiating the examination subject with x-rays from said x-ray tube at said remaining radiation dose and detecting said x-rays attenuated by the examination subject with said digital x-ray detector to obtain a following image; and

    combining said pre-image and said following image to obtain a final x-ray image, as the diagnostic image of the subject.

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