Application of Magnetic Resonance T1rho and T2 Mapping in Evaluating Cartilage Injury in Middle-aged and Elderly Patients with Knee Osteoarthritis.

To investigate magnetic resonance longitudinal relaxation time quantitative imaging (T1rho) and transverse relaxation time quantitative imaging (T2 mapping) techniques in evaluating cartilage damage in middle-aged and elderly patients with knee osteoarthritis (OA).