Ultrasound of venous doppler

Vascular ultrasound uses sound waves to evaluate the body's circulatory system and help identify blockages in arteries and veins, and to detect blood clots. This test usually includes a Doppler ultrasound (a technique that evaluates the flow of blood through a blood vessel). Ultrasound does not use ionizing radiation, has no known harmful effects, and provides an image of the soft tissues that do not appear on X-ray images.