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Timothy J. Broderick, F.A.C.S., [3] is Professor of Surgery and Biomedical Engineering at the University of Cincinnati, where he has been on the faculty since 2003. [4] He also is Chief of the Division of Gastrointestinal and Endocrine Surgery and is Director of the Advanced Center for Telemedicine and Surgical Innovation (ACTSI).
Ultrasound image showing the liver, gallbladder and common bile duct. Medical ultrasound uses high frequency broadband sound waves in the megahertz range that are reflected by tissue to varying degrees to produce (up to 3D) images. This is commonly associated with imaging the fetus in pregnant women. Uses of ultrasound are much broader, however.
Ultrasound is defined by the American National Standards Institute as "sound at frequencies greater than 20 kHz". In air at atmospheric pressure, ultrasonic waves have wavelengths of 1.9 cm or less. Ultrasound can be generated at very high frequencies; ultrasound is used for sonochemistry at frequencies up to multiple hundreds of kilohertz.
The AOL.com video experience serves up the best video content from AOL and around the web, curating informative and entertaining snackable videos.
Nationwide Children's Hospital (formerly Columbus Children's Hospital) is a nationally ranked pediatric acute care teaching hospital located in the Southern Orchards neighborhood of Columbus, Ohio.
The ultrasound probe emits a high-frequency sound wave (usually a multiple of 2 MHz) that bounces off various substances in the body. These echoes are detected by a sensor in the probe. In the case of blood in an artery , the echoes have different frequencies depending on the direction and speed of the blood because of the Doppler effect . [ 2 ]
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