Related Experiment Video
Updated: May 13, 2025
06:24
A Spine Robotic-Assisted Navigation System for Pedicle Screw Placement
Published on: May 11, 2020
8.7K
Feasibility and Accuracy of Robotic-Assisted Navigation for Thoracic Pedicle Screw Placement Using CT-Like 3D-MRI
Franziska C S Altorfer1,2, Michael J Kelly1, Giuseppe Loggia1
1Department of Spine Surgery, Hospital for Special Surgery, New York, NY.
Spine
|April 16, 2025
Summary
This study shows magnetic resonance imaging (MRI) can accurately guide robotic thoracic pedicle screw placement. This radiation-free method is ideal for young patients needing spine surgery.
Area of Science:
- Neurosurgery
- Orthopedic Surgery
- Medical Imaging
Background:
- Robotic-assisted navigation (RAN) enhances precision in thoracic pedicle screw placement.
- Current methods require CT scans, posing radiation risks, especially for pediatric patients.
- The use of CT-like 3D-MRI for thoracic pedicle screw placement is unexplored.
Purpose of the Study:
- To evaluate the feasibility and accuracy of using MRI-based robotic navigation for thoracic pedicle screw placement.
- To explore a radiation-free alternative to CT scans for spinal instrumentation.
Main Methods:
- A cadaveric study using two specimens with 48 pedicle screws placed robotically guided by CT-like 3D-MRI.
- Accuracy was assessed by post-procedure CT scans, comparing screw placement to the plan and using the Gertzbein-Robbins scale (GRS).
Main Results:
- All 48 robotically placed thoracic pedicle screws achieved acceptable GRS grades (A or B).
- 87.5% of screws were Grade A, and 12.5% were Grade B.
- Median deviations from the planned trajectory were minimal: 0.4 mm (axial) and 0.05 mm (sagittal).
Conclusions:
- MRI-based robotic-assisted navigation is a feasible and accurate method for thoracic pedicle screw placement.
- This technique offers a radiation-free alternative for thoracic spine instrumentation.
- It holds particular promise for pediatric and adolescent patients undergoing spinal fusion surgery.
