Circulation (Vascular) Ultrasound provides your doctor with moving images of your circulatory system (arteries and veins), and takes excellent pictures that will help your doctor to evaluate your circulation’s health. A specially trained technician (Sonographer) will use a gel to slide a microphone-like device called a transducer over your body. Reflected sound waves will provide images of your veins and arteries. Circulation (Vascular) Ultrasound uses the same technology that allows doctors to see an unborn baby inside the pregnant mother. In some cases, a special dye may need to be injected into the vein to help enhance the images so that your doctor can better evaluate the health of your circulatory system. This ultrasound does not involve radiation.