Abstract
Inaccurate screw insertion has been a major concern in pedicle screw placement in spinal surgery because of the potential for postoperative complications. Efforts to improve screw insertion have led to the development of novel surgical navigation systems. However, current surgical navigation systems have several problems in that the attention of surgeons is frequently interrupted during surgery, and complications occur in their depth perception because of the limitations of 2D monitors. This study proposes a surgical navigation system to address these issues using mixed reality (MR)-based smart glasses. We developed a navigation system that provides 3D visualization of the surgical tool with respect to the patient’s anatomy. It utilizes preoperative surgical planning data to provide visual feedback and guidance. An orthopedic surgeon performed pedicle screw placement with the navigation system in two different environments, using Microsoft HoloLens (HoloLens) and a 2D monitor. The results were evaluated according to procedural time, translational error, angular error, and clinical accuracy. The mean procedural time was 111.3 ± 52.7 s with the HoloLens and 192.1 ± 104.0 s with the 2D monitor. The mean translational error was 2.14 ± 1.13 mm at the entry and 3.14 ± 0.90 mm at the target with HoloLens. With the 2D monitor, the mean translational error was 2.10 ± 0.97 mm and 3.41 ± 2.16 mm at the entry and the target, respectively. The mean angular error was 6.44 ± 1.94 deg with HoloLens and 7.14 ± 4.20 deg with the 2D monitor. All screws were inserted intrapedicularly in both environments. The navigation system enables free visualization, reflects the human eye’s perspective, and retains the advantages of MR-based smart glasses. A navigation system compatible with minimally invasive surgery should be developed in the future.
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This research was supported by “Regional Innovation Strategy (RIS)” through the National Research Foundation of Korea (NRF) funded by the Ministry of Education (MOE)(2021-RIS-003).
Seokbin Hwang received his B.S. degree in biomedical engineering from the University of Ulsan, Ulsan, Korea, in 2022. He is currently undergoing an M.S. degree in the Department of Electrical, Electronic, and Computer Engineering at the University of Ulsan. His research interests include mixed reality and surgical navigation.
Suk-joong Lee received his B.S. degree in medicine from the School of Medicine, Jeonbuk National University, Jeonju, Korea, in 2003. He received his M.S. and Ph.D. degrees from the School of Medicine, Kyungpook National University. His research interests include mixed reality and surgical navigation in spine surgery.
Sungmin Kim received his B.S. degree in mechanical engineering and his M.S. and Ph.D. degrees in biomedical engineering from Hanyang University, in 2003, 2005, and 2010, respectively. He is currently an assistant professor in the Department of Biomedical Engineering at the University of Ulsan from 2019. His research interests include image-guided surgery, surgical navigation and robotics, medical image processing, surgical planning and improving the clinical environment with novel interfaces using AR, VR, and MR techniques.
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Hwang, S., Lee, Sj. & Kim, S. Surgical Navigation System for Pedicle Screw Placement Based on Mixed Reality. Int. J. Control Autom. Syst. 21, 3983–3993 (2023). https://doi.org/10.1007/s12555-023-0083-6
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DOI: https://doi.org/10.1007/s12555-023-0083-6