Figure 22. Achilles tendinosis. (a) Extended field of view ultrasound image showing diffuse fusiform swelling of the tendon (arrows) (C, calcaneus). (b) Sagittal scan with Doppler showing fusiform widening of the tendon. The tendon is hyopechoic and has a heterogeneous internal structure. Power Doppler demonstrates the typical pattern of hypervascularity with vascular channels penetrating the anterior surface of the tendon (arrows).