Fig. 1
From: Role of global femoral cartilage in assessing severity of primary knee osteoarthritis
a Plain X-ray of left knee joint anteroposterior 48 years old female patient showing grade 2 KL grading with presence of definite osteophytes and possible joint space narrowing. Sonographic assessment showed b global femoral cartilage (GFC) semi-quantitative grading G2b with loss of normal cartilage interfaces sharpness and increased echogenecity of the cartilage together with local thinning (> 50% but < 100% of the catilage), c lateral medium osteophyte grade 2 and lateral menicial extrusion measuring 1.8 mm, and d medial large osteophyte grade 3 and medial meniscial extrusion measuring 1.5 mm