Patent ID: 6494839
Filing Date: 2002-12-17
Classification: A61B,G01S

Abstract:
An ultrasonic diagnostic imaging system for sum or difference frequency imaging comprising:a transducer array exhibiting a passband encompassing the frequencies of two different transmit frequency components and the frequency of an intermodulation product of the two different transmit frequency components; a transmitter including a digital waveform generator having an output which produces a digital transmit waveform having two different transmit frequency components, and a digital to analog converter having an input coupled to the output of the digital waveform generator and an output coupled to the transducer array; a beamformer coupled to the transducer array which produces coherent echo signals of an intermodulation product of the two different transmit frequency components; and an image processor, coupled to the beamformer, which produces ultrasonic image signals in response to intermodulation product echo signals.