The ultrasound machine uses high frequency sound waves to create an image of internal structures such as soft tissue organs, muscles, tendons, and other superficial objects.  Using the Doppler Effect, ultrasound can visualize and interrogate blood vessels throughout the body.   It is a very useful tool in the diagnosis and evaluation of the human anatomical and physiological systems.  Ultrasound has been used for over 50 years and is considered one of the most widely used tools in diagnostic imaging.  Because ultrasound uses no radiation to create an image, it is considered a “safe test”.   Ultrasound is painless and is widely accepted by the medical community and patients alike.