Abstract
Purpose
Minimally invasive surgery is widely used for managing fractures; however, it is difficult to determine the exact screwing position of intramedullary nails inserted into bone. To address this problem, we developed the aiming and targeting system by laser (ATLAS) using two line lasers to mark the position of the surgical tool directly on the skin.
Methods
ATLAS consists of a laser module, controller, personal computer, and display device. The laser module is fixed to the intensifier side of the C-arm. Calibration with dedicated markers is required prior to using the system. After calibration, the laser modules can mark the selected point on a fluoroscopic image acquired with the C-arm as the intersection of the two line lasers on the skin.
Results
To verify the effectiveness of ATLAS, marking accuracy was measured. The average control error of the device itself was 0.57 mm. In the experimental setting using C-arm fluoroscopy, the accuracy was within 1.5 mm at 23 of the 25 measurement points and within 3 mm at the remaining two points.
Conclusion
ATLAS shows the corresponding points in real space with respect to fluoroscopic images using cross-points of lasers. The proposed method is clinically useful to aid the insertion of interlocking screws in minimally invasive surgeries for bone fractures. We believe that ATLAS enables more accurate marking through C-arm fluoroscopy and is more convenient, and it can thus be applied in various orthopedic surgeries.
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Acknowledgements
This work was supported by the Technology Innovation Program (No. 10063309, Development of high-precision modular restoration system for fracture reduction and bone deformity correction) funded by the Ministry of Trade, Industry & Energy (MOTIE, Korea).
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Yu, J., Song, H., Park, Cw. et al. Fluoroscopic images-based aiming and targeting system with two line lasers for insertion guidance of interlocking screw. Int J CARS 15, 1001–1012 (2020). https://doi.org/10.1007/s11548-020-02196-x
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DOI: https://doi.org/10.1007/s11548-020-02196-x