Ultrasonic diagnostic transducer array with elevation focus
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United States of America Patent
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-
Feb 20, 1996
Grant Date -
N/A
app pub date -
Jun 24, 1994
filing date -
Jun 24, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An ultrasonic diagnostic transducer array is provided for providing electronic focusing in the longitudinal plane and elevational focusing. Elements of the array are subdiced in the elevational direction to provide subelements with aspect ratios varying in proportion to their distance to the central longitudinal axis of the array. Such variation affords varying electro-mechanical coupling coefficients to the subelements such that the intensity of the transmitted energy is centered about the central longitudinal axis. In a second embodiment elements exhibit extensions in the elevational direction which vary in proportion to their displacement from the longitudinal center of the array. The extended elements are acoustically separated into subelements in the elevational direction to provide elevational focusing or spatial compounding of the transmitted acoustic energy.
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