a system and method for ultrasonic harmonic imaging . the ultrasonic harmonic imaging system comprises a wideband phased - array transducer , a transmitter for transmitting waves into the tissue , a portion of which is at a fundamental frequency and a portion of which is at a harmonic of the fundamental frequency , a receiver for receiving ultrasonic responses from the tissue , a control system electrically coupled to the transmitter and the receiver for controlling operation of the transmitter and receiver , a video processor , and a monitor .