A reconfigura using PWM m

commercial US systems have been typically used by research laboratories for the development and experimental test of new investigation methods for transmission of US,Background In medical ultrasound (US) imaging systems, also called scanners, the transmit (TX) beamformer represents an important segment that generates high-voltage (HV) pulsed sig-Background: In ultrasound imaging systems, the digital transmit beamformer is a critical module that generates accurate control over several transmission parameters. However, such transmit front-end module is not typically accessible to ultrasound researchers. To overcome this difficulty, we have been developing a compact and fully programmable digital transmit system using the pulse-width modulation (PWM) technique for generating simultaneous arbitrary waveforms, specifically designed for research purposes. Methods: In this paper we present a reconfigurable arbitrary waveform generator (RAWG) for ultrasound research applications that exploits a high frequency PWM scheme implemented in a low-cost FPGA, taking advantage of its flexibility an