MEDRADSC 1F03 Study Guide - Final Guide: Occupational Therapy, Antispasmodic, Ophanim

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The frequency we hear is much less than that used in ultrasound {20-20,000h2<2-umhz) The frequency in ultrasound can be so high as to damage tissue but the frequency used in diagnosis is safe. Longitudinal waves propagate by particle compression nd rarefaction th t r sults in parttle motion this is along or in the same direction as the wave propagation direction. There are things that change with the contact of sound waves to the body; pressure, temperature, density, particle motion (energy in the form of heat is also present- not significant) A technique is used to stop sound waves to create a void then pulses of sound. This allows for the machineryltechnologist to listen for an echo which creates an image through sending information. One pulse transmitted and received = one scan line. E trafi3d{*ca, is h@k d up t l ctricity }hjt* d{ tes {* }e"*d l str s ii: tr ,,:3ds{eri t {s.

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