The Ultrasound imaging in SVS DIAGNOSTICS is a noninvasive medical test that helps physicians diagnose and treat medical conditions. Conventional ultrasound displays the images in thin, flat sections of the body. Advancements in ultrasound technology include three-dimensional (3D) images. Four-dimensional (4D) ultrasound is 3D ultrasound in motion. A Doppler ultrasound study may be part of an ultrasound examination. The Doppler ultrasound in SVS DIAGNOSTICS is a special ultrasound technique that evaluates blood flow through a blood vessel including the body's major arteries and veins in the abdomen, arms, legs, and neck.