*3.3.1 Plain radiographs*

In all patients with recurrent dislocation of the patella, a complete plain radiographic series, consisting of standing anterior–posterior view, 45-degree flexion posterior–anterior weight-bearing view (Rosenberg view), lateral view, and axial view should be obtained. In patients with clinically diagnosed malalignment of the extremity, an additional full-length, standing alignment radiograph should also be obtained. Plain radiographs are a useful screening tool to rule out gross malalignment and fractures. However, they underestimate the presence of articular surface lesions.
