Figure 4: A 33-year-old male with knee pain 5 years after reconstruction of anterior cruciate ligament. (a and b) Coronal T1-weighted and sagittal T2-weighted images showing slightly anteriorly located femoral tunnel. (c and d) Sagittal PDFS and sagittal T2-weighted, respectively, showing the anteriorly located tibial tunnel with graft roof impingement and PDFS hyperintense signals in the graft. (e and f) Coronal short tau inversion recovery and axial T2-weighted images showing tibial tunnel