Fig. 1From: A novel ultrasound scanning approach for evaluating femoral cartilage defects of the knee: comparison with routine magnetic resonance imagingContact areas of the patellofemoral articulation during different arcs of motion, adapted from Shahriaree’s O’Connor’s Textbook of Arthroscopic Surgery [15]. Red area, femoral cartilage; gray areas, contact areas of the femoral cartilage of the patellofemoral articulation during different arcs of motionBack to article page