Fig. 4From: The trochanteric double contour is a valuable landmark for assessing femoral offset underestimation on standard radiographs: a retrospective studyPlots generated with R showing the correlations between (a) the D2 double contour width, (b) age and (c) hip side with projection error. The rate of acceptability of radiographs drops below 80% for D2 widths higher than 5 mm (d)Back to article page