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. 2018 Dec 6;6(12):2325967118811293. doi: 10.1177/2325967118811293

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© The Author(s) 2018

This article is distributed under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 License (http://www.creativecommons.org/licenses/by-nc-nd/4.0/) which permits non-commercial use, reproduction and distribution of the work as published without adaptation or alteration, without further permission provided the original work is attributed as specified on the SAGE and Open Access pages (https://us.sagepub.com/en-us/nam/open-access-at-sage).

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Figure 6. — The quadrant method to evaluate the position of the femoral and tibial tunnels. Evaluation of each tunnel outlet with standard and 3-dimensional computed tomography (3D CT): (A) To evaluate the center location of each femoral tunnel outlet, we drew the X and Y coordinate system on the 3D CT scan so that we could obtain a correct lateral view of the femoral condyle and determine the Blumensaat line. (B) To evaluate the center location of each tibial tunnel outlet, we drew the X and Y coordinate system on a standard CT scan.