Fig. 3From: A comparison of femoral tunnel placement in ACL reconstruction using a 70° arthroscope through the anterolateral portal versus a 30° arthroscope through the anteromedial portal: a pilot 3D-CT studyCalculation of difference between centre of tunnel aperture (AC; red square) and anatomical centre of anteromedial bundle (TC; blue triangle) shown on three-dimensional computed tomography reconstructed image; measurements a and b parallel and perpendicular (respectively) to Blumensaat’s line (on expanded view, distance c = √(a2 + b2))Back to article page