This is a prospective study analysing the accuracy of expected tunnel position (graft site) for anterior cruciate ligament reconstruction and to decide whether or not confirmation of the tunnel site using intraoperative imaging is required. 35 cases of anterior cruciate ligament reconstruction using bone patella bone tendon performed by three surgeons are studied. The surgeons use three different techniques. Immediately after the surgery, the surgeon marks the expected tunnel site (graft site) in a diagram (AP and LAT of femur and tibia) without seeing the x rays and a separate observer studies the actual position in the x-ray. Significance of the difference is studied using statistical tests. Best surgical outcome can be obtained using radiological confirmation of tunnel position intraoperatively with the guide wires.