Figure 1From: Arthroscopy vs. MRI for a detailed assessment of cartilage disease in osteoarthritis: diagnostic value of MRI in clinical practice Coronal PD-weighted TSE MRI of a 68-year-old woman. Tibial medial MRI shows a full-thickness defect of the cartilage with denudation of the bone (black arrow). This finding is defined as a grade 4 disorder. Signal heterogeneities within the cartilage at the lateral tibia were documented as a grade 1 cartilage disease (white arrow).Back to article page