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ULTRASONIC IMAGING SYSTEM WITH BEAMFORMING USING UNIPOLAR OR BIPOLAR CODED EXCITATION
ULTRASONIC IMAGING SYSTEM WITH BEAMFORMING USING UNIPOLAR OR BIPOLAR CODED EXCITATION
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机译：具有单极性或双极性编码激励的超声波成像系统
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摘要
A system for imaging ultrasound scatterers using coded excitation, comprising an ultrasound transducer array (10) having a multiplicity of transducer elements (12); a transmitter (14) coupled to said transducer array (10) and programmed to pulse selected transducer elements (12) which fores a transmit aperture in response to a first pulse sequence during at first transmit firing and in response to a second pulse sequence during a second transmit firing, said first and second transmit firings being focused at a transmit focal position; a receiver (16) coupled to said transducer array (10) and programmed to receive first and second sets of receive signals from selected transducer elements which form a receive aperture subsequent to said first and second transmit firings, respectively, and produce first and second beamsmmed signals respectively derived from said first and second sets of receive signals; a synthesizer (52,54,56) for subtracting said second beamsummed signal from said first beamsumned signal to form a first synthesized signal; a subsystem (46,48) for forming an image signal as a function of at least said first synthesized signal; and a display monitor (22) for displaying an image having a portion representing said image signal.
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