The injections can be performed by palpation (using anatomical landmarks to place the needle) or with ultrasound (US) guidance (with visualization of the needle tip at the target location). The chief advantage of an ultrasound-guided intervention is the ability to use real-time, dynamic imaging without ionizing radiation. Previous studies have demonstrated that ultrasound-guided injection ensures correct needle placement and delivery of the medicine to the target, and improved clinical outcomes with ultrasound-guided subacromial-subdeltoid (SASD) corticosteroid injections.