#$%^&*AU2017268559A120171221.pdf#####ABSTRACT Techniques, systems, and devices are disclosed for ultrasound imaging using spread spectrum, coherent, frequency- and/or phase-coded waveforms. In one aspect, a method of creating an image from an acoustic waveform in an acoustic imaging device includes setting the device into a transmit mode to transmit an acoustic waveform toward a target, in transmitting the acoustic waveform, synthesizing, in one or more waveform synthesizers, a plurality of substantially orthogonal coded waveforms that form a composite waveform as the transmitted acoustic waveform toward the target, in which each waveform corresponds to a distinct frequency band, setting the device into a receive mode to receive a returned acoustic waveform that returns from at least part of the target, converting the received returned acoustic waveform from analog format to digital format as a received composite waveform comprising information of the target, and processing the received composite waveform to produce an image of the target.WO 2013/066821 PCT/US2012/062435 1/6 Output Waveform Synthesizer 100 Amplifiers and Beam Controller (109) (108) Transducer Array(1 11) Comprised Of T/R . I Waveform Number of Elements Switch 2 Generator (107) (110) Data & Control Bus (103) Amplifiers MasterSystem (112) Clock Controller - -0-)-(102) AID Cornverters (113) 1 2 3 4I Display (105 Digital Signal Processor User (104) Interface (1 FIG. 1A
