Artículos de revistas
Multichannel Arbitrary Waveform Beamformer Transmitter For Experimental Research Activities Of Ultrasound [beamformer De Transmissão Multicanal De Forma De Onda Arbitrária Para Atividades De Pesquisa Experimental Do Ultrassom]
Registro en:
Controle Y Automacao. , v. 23, n. 6, p. 667 - 678, 2012.
1031759
10.1590/S0103-17592012000600002
2-s2.0-84873299592
Autor
Assef A.A.
Maia J.M.
Schneider F.K.
Costa E.T.
Da Button V.L.S.N.
Institución
Resumen
This paper presents the development of a digital beamformer transmitter system for generation of arbitrary ultrasound waveforms, specifically designed for research purposes. The proposed architecture has 8 independent excitation channels and uses an FPGA device (Field Programmable Gated Array) for electronic control channel generation of ultrasonic acoustic beam transmission. The system allows operation in pulse-echo mode, with pulse repetition rate of excitation between 62.5 Hz and 8 kHz, or single pulse, center frequency between 500 kHz and 20 MHz, excitation voltage between -100 and +100 V, and individual control of amplitude apodization, phase angle and time delay trigger. The mathematical method for determining the digital signals of excitation is presented and validated through practical results for waveform generation with Gaussian profile and center frequency of 20 MHz, in a load formed by a 220 pF capacitor in parallel with a resistor of 1 kΩ. The results show that the proposed flexible and fully programmable architecture, can support the development of new algorithms and sophisticated processing techniques of the transmission beamformer. 23 6 667 678 (2010) Cyclone III Device Handbook I-II. Altera Handbook, , Altera Corporation, San Jose, CA USA (2007) High Speed Converter Evaluation Platform - HSC-ADC-EVALC, , Analog Devices Inc., Data sheet, Norwood, MA, USA Assef, A.A., Maia, J.M., Armstrong, R.B., Ashihara, H.M., Costa, E.T., Da Button, V.L.S.N., Sistema digital gerador de forma de onda arbitrária para aplicações de ultrassom (2010) XXII Congresso Brasileiro de Engenharia Biomédica (CBEB) - 2010, pp. 391-394. , Tiradentes MG Brasil Assef, A.A., Maia, J.M., Gewehr, P.M., Gamba, H.R., Costa, E.T., Button, V.L.S.N., Sistema para geração, aquisição e processamento de sinais de ultrasom (2009) Sba Controle & Automação, 20 (2), pp. 145-155 Basoglu, C., Managuli, R., York, G., Kim, Y., Computing requirements of modern medical diagnostic ultrasound machines (1998) Parallel Computing, 24 (9-10), pp. 1407-1431. , PII S0167819198000647 Bassi, L., Boni, E., Cellai, A., Dallai, A., Guidi, F., Ricci, S., Tortoli, P., A Novel Digital Ultrasound System for Experimental Research Activities. 11th Euromicro Conference on Digital System Design Architectures (2008) Methods and Tools, pp. 413-417 Brown, J.A., Lockwood, G.R., A low-cost, high-performance pulse generator for ultrasound imaging (2002) IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 49 (6), pp. 848-851. , DOI 10.1109/TUFFC.2002.1009345 Brunner, E., (2002) Ultrasound System Considerations and Their Impact on Front-end Components., , Application Note, Analog Devices, Norwood, MA, USA Huang, S.W., Li, P.C., Arbitrary waveform coded excitation using bipolar square wave pulsers in medical ultrasound (2006) IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 53 (1), pp. 106-116 Hu, C.H., Zhou, Q., Shung, K.K., Design and implementation of high frequency ultrasound pulsed- wave doppler using FPGA (2008) IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 55 (9), pp. 2109-2111 Jensen, J.A., Holm, O., Jensen, L.J., Bendsen, H., Nikolov, S.I., Tomov, B.G., Munk, P., Gammelmark, K.L., Ultrasound research scanner for real-time synthetic aperture data acquisition (2005) IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 52 (5), pp. 881-889 Kim, Y., Kim, J.H., Basoglu, C., Winter, T.C., Programmable ultrasound imaging using multimedia technologies: A next-generation ultrasound machine (1997) IEEE Transactions on Information Technology in Biomedicine, 1 (1), pp. 19-29. , PII S1089777197035589 Mahdy, E.R., Khalil, R.M., Sherif, S., Kadah, Y.M.K., FPGA based backend system for medical bmode ultrasound imaging (2006) Proc. Cairo International Biomedical Engineering Conference (2011) Medical Imaging: Ultrasound Imaging Systems, , Maxim Integrated Products, Application Note, Sunnyvale, CA, USA Misaridis, T., Jensen, J.A., Use of modulated excitation signals in ultrasound. Part I: Basic concepts and expected benefits (2005) IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 50, pp. 192-207 (2007) Introduction to Phased Array Ultrasonic Technology Applications: R/D Tech Guideline, , Olympus NDT, Olympus NDT, MA, USA Park, J.H., Yoon, C., Chang, J.H., Yoo, Y., Song, T.K., A real-time synthetic aperture beamformer formedical ultrasound imaging (2010) IEEE Ultrasonics Symposium (IUS), pp. 1992-1995 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. , DOI 10.1049/el:20072859 Schneider, F.K., Agarwal, A., Mo Yoo, Y., Fukuoka, T., Kim, Y., A fully programmable computing architecture for medical ultrasound machines (2010) IEEE Transactions on Information Technology in Biomedicine, 14, pp. 538-540 Silkdar, S., Managuli, R., Gong, L., A single mediaprocessor-based programmable ultrasound system (2003) IEEE Transactions on Information Technology in Biomedicine, 7, pp. 64-70 (2009) MD2130 - High Speed Ultrasound Beamforming Source Driver, , Supertex Inc., Data sheet, Sunnyvale, CA, USA (2008) AFE5805 - Fully- Integrated, 8-channel Analog Front-end for Ultrasound, , Texas Instruments Inc., Data sheet, Dallas, Texas, USA Tomov, B.G., Jensen, J.A., Compact FPGA-based beamformer using oversampled 1-bit A/D converters (2005) IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 52 (5), pp. 870-880. , DOI 10.1109/TUFFC.2005.1503973 Xu, X., Yen, J.T., Shung, K.K., A low-cost bipolar pulse generator for high-frequency ultrasound applications (2007) IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 54 (2), pp. 443-447. , DOI 10.1109/TUFFC.2007.259 Zhou, S., Hossack, J.A., Dynamic-transmit focusing using time dependent focal zone and center frequency (2003) IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 50, pp. 142-152