DTI imaging application of vastus medialis oblique muscle in recurrent patellar dislocation

The osseous-related factors that influence patellofemoral joint instability have been well-studied in plenty of the previous reported literatures. However, the muscle-related factors that affect patellofemoral joint instability have not been fully revealed. MRI is a noninvasive imaging method, including conventional MRI scans and diffusion tensor imaging (DTI) sequence, which can respectively reflect the macroscopic and microscopic structures of the muscle fibers.^1,2 In the current study, the cross-sectional area were measure with DTI parameters of FA, ADC, and λ1, λ2, λ3 of vastus medialis oblique (VMO). Thereafter, these parameters were compared between the recurrent patellar dislocation patients and the healthy volunteers.