patellofemoral angle

Skyline

projection of a normal patella.Lateral patellofemoral angle is annotated, and can be used in the evaluation of patellar dislocation. Reference: (2012). "Imaging in Patellofemoral Instability". Sports Medicine and Arthroscopy Review 20 (3): 145–151. DOI:10.1097/JSA.0b013e3182553cfe. ISSN 1062-8592. Source image: File:X-ray of a normal patella.jpg (Public Domain)