Reliability and Validity of the Surgimap Software for Measuring Quadriceps Angle in Healthy Subjects

The purpose of this study is to investigate the intra- and inter-rater reliability and concurrent validity of surgimap software for measuring the Q angle Surgimap (Nemaris Inc, New York, NY, USA) is a dedicated spine measurement and surgical planning software which is used in both the research works and the clinical rehabilitation. Q angle is considered to be an index of the vector for action of the patellar tendon and extensors mechanism which is highly affects the patellofemoral joint dysfunction and foot mechanics.