Keywords : acromioclavicular joint, acromium, anisotropy, articular cartilage, biceps tendon, Bursitis, Crass position, deltoid muscle, glenohumeral joint, glenoid process, greater tuberosity, humeral head, humerus, infraspinatus muscle, infraspinatus tendon, lesser tuberosity, modified Crass position, musculoskeletal ultrasound, rotator cuff interval, rotator cuff, sub deltoid bursal space, sub-acromial impingement, sunscapularis tendon, supraspinatus muscle, supraspinatus tendon, tendinopathy, Tendinosis, Tenosynovitis, teres minor tendon