Ultrasounds can be used to assess a variety of health problems. For example, your doctor may order an ultrasound to:
- Look for gallstones in your gallbladder
- Rule out a blood clot in your leg
- Evaluate blood flow to a transplanted organ
- Check your thyroid gland
Most ultrasound exams are performed using a device outside your body, but a few involve placing a device inside your body. In a transvaginal ultrasound, for example, a special wand-like device is inserted into the vagina to examine the uterus and ovaries.