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Physical Basis and Elementary Technology

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Abstract

Ultrasounds can be defined as mechanical vibrations of matter at frequencies beyond those audible to human ears (that is to say, above 20000 Hz). The frequencies most generally used in sonography range between 1000000 and 10000000 Hz (1–10 MHz).

Keywords

Acoustic Impedance Lateral Resolution Acoustic Energy Axial Resolution Ultrasound Beam 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1988

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