A dynamic ultrasound examination of the shoulder allows the assessment of the mutual relationship between soft tissues (tendons, bursae) and bone elements during arm movements. The dynamic examination is most often used to determine the cause of damage to the tendon of the supraspinatus muscle running in the subacromial space. Thanks to the ultrasound, it is possible to locate the conflicting structures and to visually define the disorders of the biomechanics of the shoulder joint. Dynamic ultrasound helps the doctor choose the appropriate treatment method for most soft tissue pathologies.