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Updated: Jun 10, 2026

A Spine Robotic-Assisted Navigation System for Pedicle Screw Placement
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The Pathfinder image-guided surgical robot.

G Deacon1, A Harwood, J Holdback

  • 1Robotics, Vision and Graphics Ltd, Reigate, UK. gedeacon@btinternet.com

Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
|August 20, 2010
PubMed
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The Pathfinder surgical robot offers an alternative to stereotactic frames in neurosurgery. It achieves submillimetre accuracy through advanced calibration and robot-guided camera positioning.

Area of Science:

  • Neurosurgery
  • Robotics
  • Medical Imaging

Background:

  • Traditional stereotactic frames in neurosurgery can be invasive and cumbersome.
  • Image-guided surgery requires high precision for accurate instrument placement.
  • Robotic systems offer potential for improved accuracy and workflow in surgical procedures.

Purpose of the Study:

  • To describe the workflow of the Pathfinder image-guided surgical robot.
  • To detail the calibration methods for achieving submillimetre tool-tip accuracy.
  • To present an alternative to the stereotactic frame in neurosurgical navigation.

Main Methods:

  • Workflow description of the Pathfinder surgical robot.
  • Calibration procedures involving non-linear parameter identification.

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  • Camera calibration exploiting precise robot arm movements.

    • Main Results:

    • The Pathfinder robot system is designed to replace stereotactic frames.
    • Submillimetre positioning accuracy of the tool tip was achieved.
    • The calibration process integrates robot kinematics and camera parameters.

    Conclusions:

    • The Pathfinder robot system provides a viable, high-accuracy alternative for image-guided neurosurgery.
    • The described calibration techniques are crucial for achieving submillimetre precision.
    • This robotic approach enhances the capabilities of neurosurgical navigation.