Certain embodiments of the present technology provide systems and methods for focusing a two dimensional phased array to perform four dimensional ultrasonic imaging. For example, certain embodiments of the present technology provide an ultrasonic imaging system comprising: a transducer configured to emit ultrasonic beams and detect reflected ultrasonic beams a transmitter configured to transmit a first ultrasonic beam using a first focusing function and transmit a second ultrasonic beam that has a quadrature relationship to the first ultrasonic beam using a second focusing function a receiver configured to acquire a first acoustic line based on a reflected first ultrasonic beam using a first focusing function and acquire a second acoustic line based on a reflected second ultrasonic beam using a second focusing function and a beamformer configured to combine acoustic lines acquired by a receiver to create a beam pattern.
