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Related Experiment Video

Updated: Sep 13, 2025

A Spine Robotic-Assisted Navigation System for Pedicle Screw Placement
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X-ray Image-Based Pose Estimation of a Joint-Encoded Spinal Surgical Positioning Arm.

Yi-Hsin Tsai1, Chih-Min Yang2, Xiu-Yun Xiao2

  • 1Division of Neurosurgery, Department of Surgery, Far Eastern Memorial Hospital, New Taipei City, TWN.

Cureus
|August 4, 2025
PubMed
Summary

This study introduces a new passive spinal positioning arm for minimally invasive surgery. It achieves high accuracy, reduces setup and operation times, and significantly lowers radiation exposure.

Keywords:
accuracynavigation systempositioning systemradiation exposurespine surgerysurgical robotics

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Area of Science:

  • Spinal Surgery
  • Medical Device Technology
  • Surgical Navigation

Background:

  • Minimally invasive spinal surgery demands precise tool positioning.
  • Existing navigation systems are often expensive, complex, or involve high radiation doses.

Purpose of the Study:

  • To evaluate a novel passive spinal surgical positioning arm.
  • To assess its X-ray image-based pose estimation for improved surgical accuracy and efficiency.

Main Methods:

  • Developed a passive spinal positioning arm with X-ray image-based pose estimation.
  • Utilized radiographic landmarks from single intraoperative X-ray images for 6-DOF pose estimation.
  • Conducted experiments on sawbones models for pedicle screw placement.

Main Results:

  • Achieved mean translational positioning accuracy of 1.08 ± 0.40 mm.
  • Reduced average setup time to 2.3 ± 0.9 minutes and operation time to 4.2 ± 1.8 minutes.
  • Required only 6.75 ± 0.95 X-ray images per procedure, with an average radiation dose of 0.27 ± 0.04 mGy.

Conclusions:

  • The novel system demonstrates potential for reduced radiation exposure and surgical duration in spinal procedures.
  • High positioning accuracy was maintained, offering a promising alternative to current navigation systems.
  • Further clinical validation is necessary to confirm efficacy in actual surgical environments.