Ultrasound is safe, non-invasive, and radiation-free. It uses sound waves to generate an image. Ultrasound has many applications including evaluation of the gall bladder for gallstones. A specialized form of ultrasound called Doppler ultrasound can detect blood flow, and is helpful in detecting stenoses of the carotid arteries (blockage in the blood vessels of the neck) as well as thromboses (blood clots) in the legs.
Obstetrical ultrasound is the evaluation of the fetus during pregnancy. It is used to confirm pregnancy; determine whether there is more than one baby; assess the age, position, weight and well-being of a fetus; identify the location of the placenta; assess the amount of amniotic fluid; and perform a survey of fetal anatomy. Pelvic ultrasound is used to evaluate for possible causes of pain, bleeding, and abnormal physical exam findings.
