Trochlear facet asymmetry
Magnetic resonance imaging
a : width of medial trochlear facet
b : width of lateral trochlear facet
Troclear facet asymmetry ratio = a / b
Pfirrmann CW, Zanetti M, Romero J et-al. Femoral trochlear dysplasia: MR findings. Radiology. 2000;216 (3): 858-64.
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