What question did this study set out to answer?

To evaluate the in vivo accuracy of a novel handheld intraoperative stereovision system that updates preoperative CT models to reflect intervertebral motion without repeat radiation during posterior lumbar fusion.

August 1, 2026North American Spine Society Journal (NASSJ)Open Access

Radiation-Free Real-Time Registration Update for Image-Guided Multi-Level Open Posterior Lumbar Fusion: In Vivo Validation

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Authors

RDRyan B. DukeDartmouth College XFXiaoyao FanDartmouth College SBSteven BalticDartmouth–Hitchcock Medical Center

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Implication

Blinded randomized animal study demonstrates improved pedicle screw accuracy using stereovision registration in live porcine models, suggesting reduced radiation and error in spinal fusion.

Key Points

To evaluate the in vivo accuracy of a novel handheld intraoperative stereovision system that updates preoperative CT models to reflect intervertebral motion without repeat radiation during posterior lumbar fusion.
Assessed lumbar pedicle screw placement in 6 live Yucatan mini-pigs (N=66 screws) comparing preoperative CT (pCT) guidance against intraoperative stereovision updated CT (uCT).
Animals underwent preoperative CT supine in hyperextension and surgery prone in flexion; screws were randomly assigned 1:1 to pCT or uCT with the surgeon blinded to the allocation.
Registration error was significantly lower in the stereovision uCT group compared with the pCT group (3.9 ± 1.9 mm vs. 6.1 ± 5.4 mm; p < 0.05).
Grade 3 pedicle screw breaches (>4 mm) occurred in only 1 uCT screw (5.5 mm) compared to 3 breaches among pCT screws (9.5 mm, 10.9 mm, and 18.0 mm).

Cite This Study

Duke et al. (2026) studied this question.

synapsesocial.com/papers/6a98ff5d13e19562d9f0cbc7 https://doi.org/10.1016/j.xnsj.2026.100939

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Implication

Blinded randomized animal study demonstrates improved pedicle screw accuracy using stereovision registration in live porcine models, suggesting reduced radiation and error in spinal fusion.

Radiation-Free Real-Time Registration Update for Image-Guided Multi-Level Open Posterior Lumbar Fusion: In Vivo Validation

Discussion

Member takes

Implication

Key Points

Cite This Study

Radiation-Free Real-Time Registration Update for Image-Guided Multi-Level Open Posterior Lumbar Fusion: In Vivo Validation

Discussion

Member takes

Implication

Key Points

Cite This Study

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