Fig. 5From: Comparison of freehand technique and a novel laser-guiding navigation system in femoral neck-cannulated screw fixation: a randomized controlled trialPreoperative X-ray and three-dimensional CT image of 39 years male with femoral neck fracture (A, B). X-ray image of this patient undertaken femoral neck cannulated screws with the laser guiding navigation device, and the fracture healed after operation 3 months later (C, D)Back to article page