• Introduction
  • Characteristics of sounds
  • Display modes
  • Recent advances in display modes
  • Indications of usg in maxillofacial region
  • Advantages
  • Disadvantages
  • Recent advances


  • Sound is  result of mechanical energy transmitted through the medium as a pressure wave
  • In resting state, pressure is uniform through out medium
  • Physical displacement of materials cause transmission of sound
  • The sound wave produced has areas of high pressure (or high density) and low pressure (or low density)

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