Abstract
In this paper, we present a quantitative comparison of manual and computer-assisted preoperative pedicle screw placement plans, obtained from three-dimensional (3D) computed tomography (CT) images of 17 patients with thoracic spinal deformities. Manual planning was performed by two spine surgeons by means of a dedicated software for planning of surgical procedures, while computer-assisted planning was based on automated 3D segmentation and modeling of vertebral structures from CT images, and automated modeling of the pedicle screw in 3D with maximization of the screw fastening strength. The analysis of the size (diameter and length) and insertion trajectory (pedicle crossing point, sagittal and axial inclinations) for 316 pedicle screws revealed a statistically significant difference in the screw size and insertion trajectory. However, computer-assisted planning did not propose narrower and shorter screws, which was reflected through a higher normalized screw fastening strength.
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Acknowledgements
This work was supported by the Slovenian Research Agency under grants P2-0232, J2-5473, J7-6781 and J2-7118. The authors thank Ekliptik d.o.o., Slovenia, for using EBS for manual preoperative pedicle screw placement planning.
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Knez, D., Mohar, J., Cirman, R.J., Likar, B., Pernuš, F., Vrtovec, T. (2016). Manual and Computer-Assisted Pedicle Screw Placement Plans: A Quantitative Comparison. In: Yao, J., Vrtovec, T., Zheng, G., Frangi, A., Glocker, B., Li, S. (eds) Computational Methods and Clinical Applications for Spine Imaging. CSI 2016. Lecture Notes in Computer Science(), vol 10182. Springer, Cham. https://doi.org/10.1007/978-3-319-55050-3_10
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DOI: https://doi.org/10.1007/978-3-319-55050-3_10
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