Table 1.

The 21 cartilage regions of knee were automatically divided by the software

Three parts	Femoral cartilage	Patellar cartilage	Tibia cartilage
Subregions	FMP	PLI	TLP
	FMC	PLC	TLC
	FMA	PLS	TLA
	FTM	PMI	TMP
	FTC	PMC	TMC
	FTL	PMS	TMA
	FLP
	FLC
	FLA

FLA, Femoral lateral anterior; FLC, Femoral lateral central; FLP, Femoral lateral posterior; FMA, Femoral medial anterior; FMC, Femoral medial central; FMP, Femoral medial posterior; FTC, Femoral trochlea central; FTL, Femoral trochlea lateral; FTM, Femoral trochlea medial; PLC, Patellar lateral central; PLI, Patellar lateral inferior; PLS, Patellar lateral superior; PMC, Patellar medial central; PMI, Patellar medial inferior; PMS, Patellar medial superior; TLA, Tibial lateral anterior; TLC, Tibial lateral central; TLP, Tibial lateral posterior; TMA, Tibial medial anterior; TMC, Tibial medial central; TMP, Tibial medial posterior.