Fig. 2

Intraoperative fluoroscopy of the 30 ° oblique view. a: Firstly, the standard lateral view (true sagittal) of the femoral neck was got i.e. the helical blade in the femoral head was aligned in a straight line with the nail in the femur medullary canal (set as 0°). b: The C-arm was rotated 30° lower to get the new anteromedial oblique tangential view