×

X-ray scanner with secondary radiation detector

  • US 4,870,670 A
  • Filed: 10/05/1988
  • Issued: 09/26/1989
  • Est. Priority Date: 10/19/1987
  • Status: Expired due to Fees
First Claim
Patent Images

1. An x-ray scanner for inspecting an article comprising:

  • means for generating a fan-shaped x-ray beam;

    means for moving said article through said x-ray beam so that said article is irradiated thereby and generates primary radiation and scattered radiation;

    a primary radiation detector line consisting of a plurality of detector elements, each detector element receiving primary radiation from a region of said article and generating a signal corresponding thereto;

    means for scanning said elements of said primary radiation detector line at a scanning frequency for generating a primary radiation image of said article;

    means for detecting said scattered radiation disposed so that said primary radiation is not incident thereon; and

    means for modulating said scattered radiation incident on said means for detecting scattered radiation at a frequency synchronized with said scanning frequency so that only scattered radiation is incident on said means for detecting scattered radiation which is emitted by a region of said article currently being scanned for primary radiation.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×