Ultrasound imaging also called as sonography uses a transducer or probe to generate sound waves and produce pictures of the body's internal structures. It is often used to help diagnose unexplained pain, swelling or infection. It is used to see internal body structures such as tendons, muscles, joints, vessels and internal organs. Ultrasound abdomen is primarily used for evaluating the kidneys, liver, pancreas, gall bladder etc.It may also be used to provide imaging guidance to needle biopsies or to see and evaluate conditions related to blood flow. It does not use ionizing radiation, has no known harmful effects, and provides a clear picture of soft tissues that don't show up well on x-ray images. It is a painless, safe and non invasive procedure.