Abstract: [Abstract] Objective: To investigate the cartilage of knee joint osteoarthritis MRI appearance. Methods: There were 106 cases in this group, all clinical suspicion of osteoarthritis of the knee. The GE Signa Profile SYS# 0.2TMR Siemens Symphony Maestro Class . 1.5 T superconductive, imaging range for sagittal, coronal and transverse; sequence for the spin echo (S E) T 1 WI, T 2 WI, spin echo proton weighted (fat suppression sequence). Results: The knee joint cartilage focal damage was variable, including femur, tibia, patella subchondral focal injury. MRI features: (1) the subchondral bone marrow edema and focal lesions, in 88 spots . (2) the subchondral bone of focal fatty lesion. in 79 spots. (3) the subchondral bone focal blood like lesions, in 96 spots. (4) the subchondral bone focal water damage, in 99 spots. (5) the subchondral bone foci fiber like damage in 87 spots. Conclusion: MRI knee osteoarthritis subchondral bone pathological damage of MRI pattern has the important meaning for the clinical diagnosis and treatment of pathological changes, clear guidance.

Key words: MRI, osteoarthritis, knee, pathology