The profession of diagnostic medical sonography includes general sonography, cardiac sonography, vascular technology, and various subspecialties. The profession requires judgment and the ability to provide appropriate health care services. General sonographers, adult cardiac sonographers, pediatric cardiac sonographers, and vascular technologists are highly skilled professionals qualified by education to provide patient services using diagnostic techniques under the supervision of a licensed doctor of medicine or osteopathy. The general sonographer, adult cardiac sonographer, pediatric cardiac sonographer, and vascular technologist may provide this service in a variety of medical settings where the physician is responsible for the use and interpretation of appropriate procedures. General sonographers, adult cardiac sonographers, pediatric cardiac sonographers, and vascular technologists assist physicians in gathering data necessary to reach diagnostic decisions.