Ultrasound appearance of normal and degenerated Supraspinatus Tendon. Panel a) Transverse scan: a normal fibrillar pattern and thickness of Supraspinatus Tendon is observed (between calipers). Panel b) Supraspinatus Tendon is thickened (calipers), hypoechoic, dishomogeneous, with loss of the normal fibrillar pattern. In this picture, an effusion in the subacromial bursa is present (*). 1) Supraspinatus tendon; 2) Biceps tendon; H) Humeral head; D) Deltoid muscle.