@article{assef_maia_costa_2015,  title={A flexible multichannel FPGA and PC-Based ultrasound system for medical imaging research: initial phantom experiments},  volume={31},  ISSN={2446-4740},  url={https://doi.org/10.1590/2446-4740.0700},  DOI={10.1590/2446-4740.0700},  number={3},  journal={Research on Biomedical Engineering},  publisher={Sociedade Brasileira de Engenharia Biomédica},  author={Assef, Amauri Amorin and Maia, Joaquim Miguel and Costa, Eduardo Tavares},  year={2015},  month={Jul},  pages={277–281} }