Ultrasound refers to all acoustic energy with a frequency above human hearing (20khz). Diagnostic Musculoskeletal Ultrasound is a high-frequency imaging technique which transmits soundwaves into the human body via a transducer which contacts the skin. A medium ultrasound gel is used to allow the sound waves to pass through the skin to the targeted tissues/structures under examination. Ultrasound waves are reflected between the interfaces of tissues (i.e. tendon/bone) sending information back to a display allowing us to visualise the structures in real time. The display image is arranged in layers of varying greyscale which the sonographer can interpret and determine whether structures/tissues appear normal or whether pathology/injury may be present. These structures are shown in real time giving the patient a 'visual' of their condition/injury. Sometimes it is necessary to view structures whilst applying movement to a given joint area. This provides vital information whether there may be disruption to muscles/tendons/ligaments or inflamation within joint spaces, for example.