Ultrasound- this paper is on the different kinds of utrasound, the many uses of ultrasound and the dangers. there is a Bibliography

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Ultrasound Ultrasound is an imaging technique that uses high frequency sound wave and echoes. There are different kinds of ultrasound they are two-dimensional image, 3D ultrasound imagining, and Doppler ultrasound. Doppler ultrasound is based on the Doppler effect. (Doppler effect is whenever relative motion exists between a source of sound and a listener and the frequency of the sound heard by the listener sounds different compared to the frequency when there is no motion.) The …

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…temperature locally. 2. The formation of bubbles- when the liquefied gases come out of the solution due to local heat caused by the ultrasound's energy. Yet, there is no substance ill effect of ultrasound documented in the studies in either humans or animals. Ultrasound should be only used when necessary. Bibliography 1 How ultrasound works. Freudenrich, Craig c., Ph.D. 1/6/03. http://www.howstuffworks.com/ultrasound.htm. 2 Doppler effect. May 8, 1995. 1/6/03. http://csgrad.cs.vt.edu/~chin/doppler.html.