HIGH FRAME RATE QUANTITATIVE DOPPLER FLOW IMAGING USING UNFOCUSED TRANSMIT BEAMS

摘要

There is provided an ultrasound imaging system having a pixel orientation processing function, in which a method for generating a Doppler velocity image comprises: emitting unfocused acoustic signals to a medium on a substantially entire field; Receiving ultrasound signals scattered and reflected on the transducer array in response to the emission; Processing the received ultrasound signals, comprising: processing the received ultrasound signals to extract information and construct a Doppler rate signal corresponding to at least one point of the media; And generating the Doppler velocity image on the display device from the processed Doppler velocity signal. Acquisition sequences and signal processing algorithms that provide improved quantification of blood flow parameters, including improved differentiation between blood flow and regions of tissue, are described. Very high frame rate spectral Doppler and vector Doppler acquisition modes for real-time and post-acquisition visualization on a large field of view are described.