ULTRASOUND IMAGING USING COUNTER PROPAGATING WAVES

摘要

An ultrasound imaging method and apparatus are described. The method comprises transmitting a reference excitation signal into a target medium and receiving first echo signals corresponding to the reference excitation signal. The method further comprises transmitting an imaging excitation signal into the target medium, transmitting a manipulation signal into the target medium, the imaging excitation signal and the manipulation signal not overlapping in time, and receiving second echo signals corresponding to the imaging excitation signal and manipulation signal and an interaction therebetween. The method further comprises generating an output signal based on a difference between the first echo signals and second echo signals.