Sagittal T1
Sagittal T2
Sagittal PD
Axial T2
Coronal STIR
Diffuse hyaline articular cartilage thinning.
Thickened edematous knee synovium (synovitis).
Marked joint effusion.
Peripheral erosion of the posterior aspect of the medial tibial plateau.
Subchondral marrow signal changes.