doi:

DOI: 10.3724/SP.J.1146.2009.00425

Journal of Electronics & Information Technology (电子与信息学报) 2010/32:4 PP.959-962

Ultrasounic Imaging Based on Coded Exciting Technology and Adaptive Beamforming


Abstract:
Compared with traditional imaging algorithm based on Delay and Sum (DAS), Capon algorithm can increase horizontal resolution of medical ultrasound image, but the contrast is not improved. A new algorithm named Chirp_Caopn is proposed in this paper, which combines ultrasound coded exciting technology with Capon algorithm, so the excellent relation of coded signal can remedy the common contrast of Capon algorithm. The simulated result shows that compared with Capon algorithm, the new algorithm not only improves the horizonta resolution, but also can give a high contrast image with less noise.

Key words:Ultrasonic imaging,Chirp_Capon algorithm,Delay And Sum(DAS),Contrast,Horizontal resolution

ReleaseDate:2014-07-21 15:17:47



[1] Guenther D A and Walker W F. Optimal contrast resolution beamforming[C]. IEEE Ultrasonics Symposium. New York. USA, Oct., 2007: 37-41.

[2] Holfort I K, Gran F, and Jensen A. Minimum variance beamforming for high frame-rate ultrasound imaging[C]. IEEE Ultrasonics Symposium. New York. USA, Oct., 2007: 1541-1544.

[3] Vignon F and Burcher M R. Capon beamforming in medical ultrasound imaging with focused beams[J]. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2008, 55(3): 619-628.

[4] Synnevag J F, Austeng A, and Holm S. Adaptive beamforming applied to medical ultrasound imaging[J]. IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, 2007, 54(8): 1606-1613.

[5] 杜春宁. 超声成像数字波束形成算法研究[D]. [硕士论文], 中国科学技术大学, 2007.

[6] 韩雪梅, 彭虎, 杜宏伟等. 基于线性调频信号的高帧率超声成像系统[J]. 中国生物医学工程学报, 2005, 24(6): 700-704.

[7] 杜春宁, 彭虎. 一种改进的Capon波束形成算法在超声成像中的研究[J]. 中国生物医学工程学报, 2007, 26(5): 690-694.

[8] Jensen J A. Field: A program for simulating ultrasound systems [J]. Med Biol Engineering and Computing, 1996, 34(S1): 351-353.

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