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Ultrasound imaging, also called ultrasound scanning or sonography, involves exposing areas of the body to high-frequency sound waves to produce pictures of the inside of the body. Ultrasound exams do not use ionizing radiation (x-ray). Because ultrasound images are captured in real-time, they can show the structure and movement of the body's internal organs, as well as blood flowing through blood vessels.
Ultrasound imaging is usually a painless medical test that helps physicians diagnose and treat medical conditions.
You can find more information about these tests at radiologyinfo.org
How to Prepare
Abdominal/Gallbladder/Liver/Pancreas- Nothing to eat or drink six hours prior to your exam including chewing gum and smoking.
OB Sonogram (Pregnancy) - Drink a minimum of 16 ounces of clear fluid at least one hour before your appointment. Do not void at least one hour prior to the sonogram.
Pelvic or Renal Sonogram - Drink a minimum of 24 ounces of clear fluid at least one hour before your appointment. Do not void at least one hour prior to the sonogram.