Diagnostic ultrasound is a safe procedure that uses low-power sound waves. There are no known risks.

Although ultrasound is a valuable tool, it has limitations. Sound doesn't travel well through air or bone, so ultrasound isn't effective at imaging parts of your body that have gas in them or are hidden by bone. To view these areas, your doctor may order other imaging tests, such as CT or MRI scans or X-rays.

Jan. 24, 2015