Ultrasonic medical diagnostic apparatus and method
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United States of America Patent
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-
Jan 6, 1981
Grant Date -
N/A
app pub date -
Feb 1, 1979
filing date -
Feb 1, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The non-invasive testing of soft body tissue is accomplished with the use of a beam of ultrasonic energy which may be focused at varying depths in a patient. The energy content of the ultrasound beam is varied as a function of depth of focus to thereby employ the minimum energy required for proper resolution at the chosen examination depth. Signals commensurate with echoes received by a transducer having an array of coaxial annular electrodes thereon are combined in a manner which results in a good signal-to-noise ratio and minimum attenuation thereby improving the quality of the information derived from the examination procedure.
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