Table 1 The morphometric parameters of distal femur, proximal tibia and the patella

fAP

Femoral antero-posterior distance [4, 5]

Distance from the deepest point of the trochlea to the fPML line that is tangential to the posterior femoral condyles

fML

Femoral medio-lateral distance [5,6,7]

Distance from the medial-most to the lateral-most aspects of the distal femur at the level of the intercondylar notch

fLAP

Femoral lateral antero-posterior distance^. [3,4,5]

Distance from the anterior-most to the posterior-most aspects of the lateral femoral condyle

fMAP

Femoral medial antero-posterior distance [1, 3,4,5]

Distance from the anterior-most to the posterior-most aspects of the medial femoral condyle

fAML

Femoral anterior medio-lateral distance [5]

Distance between 2 anterior-most points of the medial and lateral femoral condyles

fPML

Femoral posterior medio-lateral distance [5]

Distance between 2 posterior-most points of the medial and lateral femoral condyles

fAR

Femoral aspect ratio [6]

The quotient of fML and the average of the fMAP and fLAP

tML

Tibial medio-lateral distance [3,4,5]

The distance from the medial-most to the lateral-most aspects of the proximal tibia on cross-sectional view

tAP

Tibial antero-posterior distance [3,4,5]

The distance from the anterior-most to the posterior-most aspects of the tibial plateau passing through the midpoint of the intercondylar eminence

tLAP

Tibial lateral antero-posterior distance [1, 3, 5]

The distance from the anterior-most to the posterior-most aspects of the lateral tibial condyle

tMAP

Tibial medial antero-posterior distance [1, 3, 5]

The distance from the anterior-most to the posterior-most aspects of the medial tibial condyle

tAR

Tibial aspect ratio [6]

The quotient of tML and the average of the tMAP and tLAP

pH

Patellar height

The distance from the superior-most to the inferior-most aspects of the patella on sagittal view with the profile of the patella at its maximum

pW

Patellar width

The distance from the medial-most to the lateral-most aspects of the patella on coronal view with the maximum outline of the patella

pT

Patellar thickness

The distance from the anterior-most to the posterior-most aspects of the patella on sagittal view with the profile of the patella at its maximum