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 ENG  Vol.5 No.10 B , October 2013
An Adaptive Pulse Compression Filter for Ultrasound Contrast Harmonic Imaging
Abstract: Coded excitation is useful for ultrasound contrast imaging to increase penetration and SNR, and improve the contrast to tissue ratio (CTR). The waveform of bubble response depends greatly on bubble size, the frequency and bandwidth of the excitation chirp signal. This makes the pulse compression filter based on square-law be wrong for bubbles with changing sizes. In this paper, an adaptive pulse compression (APC) filter for the second harmonic of microbubble with varying size distribution is proposed. The APC filter is designed based on the estimated power spectrum of the received bubble harmonic echoes. Theoretical analysis and simulation studies are presented for evaluating performance of the APC filter. For monodisperse bubble, the power improvement factor of the APC filter can be more than 20 dB.
Cite this paper: Tsao, J. and Chen, M. (2013) An Adaptive Pulse Compression Filter for Ultrasound Contrast Harmonic Imaging. Engineering, 5, 118-122. doi: 10.4236/eng.2013.510B024.
References

[1]   J. M. G. Borsboom, C. T. Chin, A. Bouakaz, M. Versluis, and N. de Jong, “Harmonic Chirp Imaging Method for Ultrasound Contrast Agent,” IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Vol. 52, 2005, pp. 241-249. http://dx.doi.org/10.1109/TUFFC.2005.1406550

[2]   A. Novell, S. Van Der Meer, M. Versluis, N. De Jong, and A. Bouakaz, “Contrast Agent Response to Chirp Reversal: Simulations, Optical Observations, and Acoustical Verification,” IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Vol. 56, 2009, pp. 1199-1206. http://dx.doi.org/10.1109/TUFFC.2009.1161

[3]   C. Mac-Donald, V. Sboros, et al., “A Numerical Investigation of the Resonance of Gas-Filled Microbubbles: Resonance Dependence on Acoustic Pressure Amplitude,” Ultrasonics, Vol. 43, 2004, pp. 113-122. http://dx.doi.org/10.1016/j.ultras.2004.04.001

[4]   L. Hoff, “Acoustic Characterization of Contrast Agents for Medical Ultrasound Imaging,” Kluwer Academic, Boston, 2001. http://dx.doi.org/10.1007/978-94-017-0613-1

[5]   L. Hoff, P. C. Sontum and J. M. Hovem, “Oscillations of Polymeric Microbubbles: Effect of the Encapsulating Shell,” Journal of the Acoustical Society of America, Vol. 107, 2000, pp. 2272-2280.

[6]   C. C. Church, “The Effects of an Elastic Solid Surface Layer on the Radial Pulsations of Gas Bubbles,” Journal of the Acoustical Society of America, Vol. 97, 1995, pp. 1510-1421. http://dx.doi.org/10.1121/1.412091

[7]   S. Hilgenfeldt, D. Lohse and M. Zomack, “Response of Bubbles to Diagnostic Ultrasound: A Unifying Theoretical Approach,” European Physical Journal B, Vol. 4, 1998, pp. 247-255. http://dx.doi.org/10.1007/s100510050375

[8]   T. Misaridis and J. A. Jensen, “Use of Modulated Excitation Signals in Medical Ultrasound. Part II: Design and Performance for Medical Imaging Applications,” IEEE Transactions of UFFC, Vol. 52, 2005, pp. 192-207. http://dx.doi.org/10.1109/TUFFC.2005.1406546

[9]   D. Y. Kim, J. C. Lee, S. J. Kwon and T.K. Song, “Ultrasound Second Harmonic Imaging with a Weighted Chirp Signal,” Proceedings of IEEE Ultrasound Symposium, 2001, pp. 1477-1480.

[10]   D. H. Simpson, C. T. Chin and P. N. Burns, “Pulse Inversion Doppler: A New Method for Detecting Nonlinear Echoes from Microbubble Contrast Agents,” IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, Vol. 46, 1999, pp. 372-382. http://dx.doi.org/10.1109/58.753026

 
 
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