×

Method and system for frameless tool calibration

  • US 5,921,992 A
  • Filed: 04/11/1997
  • Issued: 07/13/1999
  • Est. Priority Date: 04/11/1997
  • Status: Expired due to Fees
First Claim
Patent Images

1. A system for calibrating the position and direction of a surgical instrument in the coordinate system of a camera system that tracks the surgical instrument in an operative field comprising:

  • a. a camera system, having a camera coordinate system, adapted to track objects in the operative field having light markers attached to them;

    b. a surgical instrument having a probe direction and a probe end;

    c. a light marker system having a light marker coordinate system, the light marker system being adapted to attach to the surgical instrument and can be tracked by the camera system to determine the light marker coordinate system relative to the camera coordinate system;

    d. a calibration guide that is adapted to align the probe direction and probe end in a known position relative to said camera coordinate system;

    whereby after alignment of said probe direction and probe end in the calibration guide, said probe direction and said probe end can be tracked by said camera system relative to said camera coordinate system.

View all claims
  • 4 Assignments
Timeline View
Assignment View
    ×
    ×