Fig. 1.

A, B, C: Intraoperative C-arm imaging showing a perfect lateral radiograph with the fracture reduced and jig partially (A) or fully (B) obscuring the femoral head. The femoral head, neck, shaft, nail and jig should ideally be aligned to estimate the position of the lag screw. If the alignment shows the position will be off-centered, then rotational adjustments can be made. (C) A perfect lateral radiograph, defined as the femoral head, neck and shaft aligned, while the fracture is reduced. This radiograph is necessary to obtain in order to measure an accurate tip-apex distance after lag screw placement.