An ultrasound scan, sometimes called a sonogram, is a procedure that uses high-frequency sound waves to create an image of part of the inside of the body. It is used to see internal body tissues such as tendons, joints, muscles, vessels and organs. Its aim is often to find a source of a disease or to exclude any pathology, and is common practice in examining pregnant women.
Sonographers are medical professionals who perform scans which are then typically interpreted by themselves or the radiologists, doctors who specialize in the application and interpretation of a wide variety of medical imaging modalities, or by cardiologists in the case of cardiac ultrasonography (echocardiography). Sonographers typically use a hand-held probe (called a transducer) that is placed directly on and moved over the patient.