Knee
Quadriceps angle
15-20°
Radiography (Anteroposterior)
Magnetic resonance imaging
X-ray computed tomography
It is the intersection of a line drawn parallel to the quadricipital axis and another line parallel to the patellar tendon in a coronal plane.
Some authors advocate the value varies according to sex as follows :
Male 14±3°
Female 17±3°
Synonyms: Q angle
Reference
Margheritini F. Orthopedic Sports Medicine, Principles and Practice. Springer. (2011).
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