Artículos de revistas
A Flexible Multichannel Fpga And Pc-based Ultrasound System For Medical Imaging Research: Initial Phantom Experiments
Registro en:
Revista Brasileira De Engenharia Biomedica. Sociedade Brasileira De Engenharia Biomedica, v. 31, n. 3, p. 277 - 281, 2015.
15173151
10.1590/2446-4740.0700
2-s2.0-84944872756
Institución
Resumen
Introduction: In this paper, we present the initial results of a fully programmable 128-channel FPGA and PC‑based system that has been developed for medical ultrasound (US) imaging research in our University laboratory (Federal University of Technology - Paraná, Brazil). Methods: In order to demonstrate the feasibility of the US research system, two applications involving unfocused plane wave transmission and conventional B-mode beamforming were evaluated using a commercial tissue-mimicking phantom and a 3.2 MHz 128-element convex array transducer. Results: Testing results show that the hardware platform is able to synthesize arbitrary pulses up to 100 Vpp with second order harmonic distortion below 80 dB. For the first application, a 41-tap digital FIR bandpass filter was applied to the acquired RF echoes, sampled at 40 MHz with 12-bit resolution, to improve the noise suppression. In the second application, after offline apodization weighting, filtering, delay-and-sum processing, envelope detection, log compression and scan conversion, the reconstructed B-mode image is displayed over a 50 dB range. Conclusion: The presented results indicate that the open US imaging system can be used to support different ultrasonic transmission and reception strategies, which typically cannot be implemented in conventional data flow architectures that are mainly based on hardware. © 2015 Sociedade Brasileira de Engenharia Biomedica. 31 3 277 281 Assef, A.A., Maia, J.M., Schneider, F.K., Costa, E.T., Button, V.L., Design of a 128-channel FPGA-based ultrasound imaging beamformer for research activities (2012) Proceedings of the 2012 IEEE International Ultrasonics Symposium (IUS), pp. 635-638. , 2012 Oct 7-10 Dresden, Germany. Dresden: IEEE Assef, A.A., Maia, J.M., Schneider, F.K., Button, V.L., Costa, E.T., A reconfigurable arbitrary waveform generator using PWM modulation for ultrasound research (2013) Biomedical Engineering Online, 12 (1), 24p. , http://dx.doi.org/10.1186/1475-925X-12-24, PMid:23514530 Assef, A.A., Maia, J.M., Schneider, F.K., Gewehr, P.M., Da Costa, R., De Moraes, A.F., Método computacional de conversão de varredura para apresentação de imagens setoriais por ultrassom (2014) Proceedings of the XXIV Congresso Brasileiro De Engenharia Biomédica (CBEB 2014), pp. 324-327. , 2014 Oct 13-17 Uberlândia, Brazil. Uberlândia: SBEB Boni, E., Bassi, L., Dallai, A., Guidi, F., Ramalli, A., Ricci, S., Housden, J., Tortoli, P., A reconfigurable and programmable FPGA-based system for nonstandard ultrasound methods (2012) IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 59 (7), pp. 1378-1385. , http://dx.doi.org/10.1109/TUFFC.2012.2338, PMid:22828833 Hu, C., Zhang, L., Cannata, J.M., Yen, J., Shung, K.K., Development of a 64 channel ultrasonic high frequency linear array imaging system (2011) Ultrasonics, 51 (8), pp. 953-959. , http://dx.doi.org/10.1016/j.ultras.2011.05.010, PMid:21684568 Jensen, J.A., (1999) Linear Description of Ultrasound Imaging Systems, , http://field-ii.dk/documents/ref_jaj_1999.pdf, [internet]. 1999cited, Jul 5 Qiu, W., Yu, Y., Sun, L., A programmable, cost-effective, real-time high frequency ultrasound imaging board based on high-speed FPGA (2010) Proceedings of the 2010 IEEE Ultrasonics Symposium (IUS), pp. 1976-1979. , 2010 Oct 11-14 San Diego, USA. San Diego: IEEE Qiu, W., Yu, Y., Tsang, F.K., Sun, L., A multifunctional, reconfigurable pulse generator for high-frequency ultrasound imaging (2012) IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 59 (7), pp. 1558-1567. , http://dx.doi.org/10.1109/TUFFC.2012.2355, PMid:22828850 Ricci, S., Bassi, L., Boni, E., Dallai, A., Tortoli, P., Multichannel FPGA-based arbitrary waveform generator for medical ultrasound (2007) Electronics Letters, 43 (24), pp. 1335-1336. , http://dx.doi.org/10.1049/el:20072859 Saniie, J., Oruklu, E., Yoon, S., Introduction to the special issue on novel embedded systems for ultrasonic imaging and signal processing (2012) IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 59 (7), pp. 1329-1331. , http://dx.doi.org/10.1109/TUFFC.2012.2333, PMid:22828831 (2015) Vantage Brochure and Specifications, , http://www.verasonics.com/uploads/files/Vantage%20Family%20Brochure%20and%20Specifications%281%29.pdf, Verasonics, [internet], [cited 2015 May 1] Wilson, T., Zagzebski, J., Varghese, T., Chen, Q., Rao, M., The ultrasonix 500RP: A commercial ultrasound research interface (2006) IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 53 (10), pp. 1772-1782. , http://dx.doi.org/10.1109/TUFFC.2006.110, PMid:17036786