After sacrifice, the graft-femoral samples (n=6) were scanned with micro-CT (Brilliance CT, Model No. 728302; Philips Medical Systems, Inc., Cleveland, Ohio) before the biomechanical studies. All bone tunnel model images were acquired via a Philips Brilliance workstation (Software Version: 3.2.4.1900; Philips Medical Systems, Inc., Cleveland, Ohio). The bone tunnel diameter at the aperture was analyzed with DICOM software according to a previous method (Figure 2) (31 (link)). In each image, the tunnel diameter was measured from two directions and averaged. The femoral tunnel diameter of each case was calculated as the average of the values of five consecutive images.