Fig. 5

Femoral apertures placed by each technique [transtibial (A) and independent (B)] quantified by quadrant method on 3D CT reconstructed profile view of medial wall of lateral femoral condyle. The area in the black square frame contains 16 small points representing the centers of femoral apertures placed in 16 studies and synthesized in forest plots presented in Figs. 4A and 7A. This is magnified in C and D, respectively. h: line perpendicular to the Blumensaat’s line, t: line parallel to the Blumensaat’s line