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Apparatus and method for detection and localization of a biopsy needle or similar surgical tool in a radiographic image

  • US 5,930,329 A
  • Filed: 09/22/1997
  • Issued: 07/27/1999
  • Est. Priority Date: 09/22/1997
  • Status: Expired due to Term
First Claim
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1. A method for detection and localization of a surgical tool in a radiographic image, comprising the steps of:

  • generating a radiographic reference image Ip, including an image of a surgical device and an anatomical background image;

    applying an oscillating movement to said device;

    generating a number k of radiographic images Ik during said oscillating movement;

    subtracting each image Ik from a preceding reference image Ip so as to generate a difference image (Ik -Ip); and

    deriving said mathematical intersection of all of said reference images (Ik -Ip), whereby a resulting image results including only said image of said device on said radiographic reference image Ip and substantially without said anatomical background image.

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