System and method for ultrasound imaging

A system, comprising:

• at least one storage medium including a set of instructions;
• and
• at least one processor configured to communicate with the at least one storage medium, wherein when executing the set of instructions, the at least one processor is configured to direct the system to perform operations including:
• obtaining ultrasound signals of pixels of at least one region, wherein the ultrasound signals are generated based on a scanning protocol, the scanning protocol including virtual focuses of a plurality of transmissions of ultrasound waves from an ultrasound scanner and an interval between each pair of consecutive transmissions of the plurality of transmissions, the virtual focuses are far-field virtual focuses;
• generating a plurality of primary images of the at least one region corresponding to the plurality of transmissions, each of the plurality of primary images being generated by beamforming an ultrasound signal of each pixel of the at least one region corresponding to one of the plurality of transmissions;
• and
• generating an ultrasonic image of a subject located in the at least one region by combining or fusing the plurality of primary images corresponding to the plurality of transmissions, each primary image of the plurality of primary images corresponding to one transmission of the plurality of transmissions, and the virtual focuses of each transmission of the plurality of transmissions are far-field virtual focuses.