ACAA	Astragalar Calcaneal Articular Area
AEI	Angular Efficiency Index
AMWT	Astragalar Maximum Width within the Trochlea
ANAA	Astragalar Navicular Articular Area
ANSL	Astragalar Navicular Surface Length
ATTA	Astragalar Tibial Tarsal Angle (also referred to as Head Orientation Angle, HOA)
CRAA	Calcaneal Relative Articular Area
ICC	Intraclass Correlation Coefficient
JAE	Joint Angular Excursion
LTL	Lateral Trochlear Length
MTL	Medial Trochlear Length
NFP	Navicular Facet Proportions
NRAA	Navicular Relative Articular Area
PCA	Principal Component Analysis
SD	Standard Deviation
SEM	Standard Error of Measurement
TAE	Total Angular Excursion
TDI	Trochlear Depth Index
TRAA	Trochlear Relative Articular Area