Patent ID: 11885877
Assignee: DALHOUSIE UNIVERSITY
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 14:
15. A method of performing ultrasound imaging, the method comprising:
delivering encoded transmit signals to an ultrasound array comprising a plurality of ultrasound array elements to sequentially transmit a plurality of diverging ultrasound waves, such that each diverging ultrasound wave is generated by transmitting a respective set of encoded transmit signals to a fixed aperture of the ultrasound array, the fixed aperture consisting of N elements of the ultrasound array;
wherein each set of encoded transmit signals is encoded by a respective row of an N×N invertible orthogonal matrix such that only a selected subset of M rows of the invertible orthogonal matrix is employed to encode the transmit signals, wherein M<N;
detecting receive signals from the ultrasound array in response to the transmitted diverging waves, wherein each set of receive signals is associated with transmission of a respective diverging wave;
decoding the sets of receive signals with a transposed matrix to obtain a plurality of sets of decoded receive signals, wherein the transposed matrix is generated based on the invertible orthogonal matrix such that each set of decoded receive signals is associated with insonification via a subset of the ultrasound array elements in the fixed aperture; and
performing synthetic aperture beamforming on the plurality of sets of decoded receive signals to generate an ultrasound image.