Ultrasound imaging, also known as ultrasound scanning or sonography, is a method of obtaining images from inside the human body through the use of high frequency sound waves. The sound waves' echoes are recorded and displayed as a real-time, visual image. Ultrasound is generally considered safe when used by properly trained providers for medical purposes.
Physicians routinely use ultrasound imaging to check the size, location, number, or age of fetuses in the womb; the presence of some types of birth defects; fetal movement; breathing; and heartbeat. However, ultrasound should not be considered completely innocuous. Laboratory studies have shown that diagnostic levels of ultrasound can produce physical effects in tissue, such as mechanical vibrations and rise in temperature, particularly when used for a prolonged period of time.
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The FDA stated on August 30, 2005, that "public health experts, clinicians and industry agree that casual exposure to ultrasound, especially during pregnancy, should be avoided. Viewed in this light, exposing the fetus to ultrasound with no anticipation of medical benefit is not justified."
For more information on ultrasound and sonography, please visit www.acr.org or www.radiologyinfo.org.
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