Definition: The location, measurement, or delineation of deep structures by measuring the reflection or transmission of high frequency or ultrasonic waves. Computer calculation of the distance to the sound-reflecting or absorbing surface plus the known orientation of the sound beam gives a two-dimensional image.
Synonym(s): echography, sonography
[ultra- + L. sonus, sound, + G. grapho, to write]
See Also: ultrasound
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