Table 1: Morphological (metrics), statistical, and anatomical (region of interest) labels commonly used in cartilage morphology publications on the knee.

Abbreviation Explanation Unit Morphological (metrics) label VC volume of the cartilage (mm3/mL) tAB total area of subchondral bone (cm2) AC area of cartilage surface (cm2) cAB area of tAB covered by AC (cm2) dAB% percent of tAB denuded (not covered by AC) (%) VCtAB volume of the cartilage divided by tAB (mm) ThCtAB thickness of the cartilage over the entire tAB (mm) ThCcAB thickness of cartilage over cAB (mm) dAB% percent of tAB denuded (not covered by AC) (%) VCtAB volume of the cartilage divided by tAB (mm) ThCtAB thickness of the cartilage over the entire tAB (mm) ThCcAB thickness of cartilage over cAB (mm) Statistical labels Me mean (i.e., thickness) Max maximum (i.e., thickness) Mav maximal averaged, for example, mean of the top 1% values Min minimum (i.e., thickness) Miv minimum averaged, for example, mean of the lowest 1% values SD standard deviation (i.e., thickness) CV% coefficient of variation (i.e., thickness) c(Me, Mav) thickness measured from cartilage surface (AC) to bone interface (tAB) b(Me, Mav) thickness measured from bone interface (tAB) to cartilage surface (AC) a(Me, Mav) average of the two above (b, c)   Anatomical (region of interest) labels Total cartilage plates  P Patella  MT Medial tibia  LT Lateral tibia  F Femur  TrF Femoral trochlea  MF Medial femoral condyle    cMF weight-bearing portion of MF    pMF posterior portion of MF  LF Lateral femoral condyle    cLF weight-bearing portion of LF    pLF posterior portion of LF  MFTC aggregate values for MT and cMF (MT + cMF)  LFTC aggregate values for LT and cLF (LT + cLF)   Subregions (to be combined with above total plate labels, i.e., cMT or ccMF) c central e external i internal a anterior p posterior

For anatomical (region of interest) labels, also see Figures 1 and 2.