Ultrasound (Sonogram) No anatomic or functional abnormalities The organs are normal in size, shape, contour, and position. The internal structures of the organs and tissues are within normal limits. High-frequency sounds are directed into an area of the body in a specific pattern.  The echoes of the ultrasound are converted to visual images, linear tracings, or audible sounds. Tumor Cyst Hypertrophy Abscess Atherosclerotic plaque Venous Thrombosis Obstruction or stricture Calculus Congenital anomaly Aneurysm Hematoma, bleeding Foreign body Pregnancy, fetal development Air, Bowel gases Overlying bone Barium Obesity