AI Article Synopsis

  • This study investigates the use of preoperative MRI techniques (ZTE and SPGR) to aid in robotic-assisted spine surgery for accurately placing lumbar pedicle screws.
  • The research involved using MRI scans on a cadaver and then navigating a surgical robot to position the screws, later verified by a CT scan.
  • Results showed that all screws were placed accurately (graded A), with minimal deviation of around 0.25 mm, indicating a promising direction for reducing radiation exposure in spine surgeries.

Article Abstract

Study Design: Human Cadaveric Study.

Objective: This study aims to explore the feasibility of using preoperative magnetic resonance imaging (MRI), zero-time-echo (ZTE) and spoiled gradient echo (SPGR), as source data for robotic-assisted spine surgery and assess the accuracy of pedicle screws.

Methods: Zero-time-echo and SPGR MRI scans were conducted on a human cadaver. These images were manually post-processed, producing a computed tomography (CT)-like contrast. The Mazor X robot was used for lumbar pedicle screw-place navigating of MRI. The cadaver underwent a postoperative CT scan to determine the actual position of the navigated screws.

Results: Ten lumbar pedicle screws were robotically navigated of MRI (4 ZTE; 6 SPGR). All MR-navigated screws were graded A on the Gertzbein-Robbins scale. Comparing preoperative robotic planning to postoperative CT scan trajectories: The screws showed a median deviation of overall 0.25 mm (0.0; 1.3), in the axial plane 0.27 mm (0.0; 1.3), and in the sagittal plane 0.24 mm (0.0; 0.7).

Conclusion: This study demonstrates the first successful registration of MRI sequences, ZTE and SPGR, in robotic spine surgery here used for intraoperative navigation of lumbar pedicle screws achieving sufficient accuracy, showcasing potential progress toward radiation-free spine surgery.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11571642PMC
http://dx.doi.org/10.1177/21925682241232328DOI Listing

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