In addition to producing images, ultrasound can be used to heat tissues of the body for
Chapter 16, Problem 49(choose chapter or problem)
In addition to producing images, ultrasound can be used to heat tissues of the body for therapeutic purposes. An emitter is placed against the sutface of the skin; the amplitude of the ultrasoundwave at this poi nt is quite large. When a sound wave hitsthe boundary between soft t.issue and bone, most of the e nergy isreflected. The bounda1y acts like the closed end of a tube, whichcan lead to standing waves. Suppose 0.70 MHz ultrasound isdirected through a layer of tissue with a bone 0.55 cm below thesurface. Will standing waves be created? Explain.
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