Ultrasound imaging with synthetic transmit focusing

Details Ultrasound imaging with synthetic transmit focusing Ultrasound imaging with synthetic transmit focusing

1999-08-16

2000-05-02

Lateef, Marvin M.

Surgery

Diagnostic testing

Detecting nuclear, electromagnetic, or ultrasonic radiation

A61B 800

Patent

active

060566930

ABSTRACT:
Ultrasound imaging of biological tissue using synthetic transmit focusing is performed by forming a combined echo signal at a target range from two transmit events: one with the focal point located at a depth less than the target range depth and the other with the focal point located at a depth greater than the target range depth. In the target range segment lying between the two focal points, the two echo signals are combined by applying weighting factors that are determined as a function of the target range location along the range segment defined by the two transmit focal points. A first weighting factor applied to a first echo signal derived from a first transmit focused at a first focal point has a maximum (i.e., unity) at the first focal point and decreases with increasing distance from the first focal point (decreasing to zero at the second focal point). A second weighting factor applied to a second echo signal derived from a second transmit focused at a second focal point has a value equal to unity minus the first weighting factor.

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