Combined Pulse Compression and Adaptive Beamforming in Coded Excitation Ultrasound Medical Imaging
Combined Pulse Compression and Adaptive Beamforming in Coded Excitation Ultrasound Medical Imaging
复制标题
编码激励超声医学成像中的组合脉冲压缩和自适应波束形成
DOI：
10.1109/icsps.2009.52
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
H. Behnam
中科院分区：
文献类型：
--
作者：
T. Toosi;H. Behnam
编码激发技术在医学超声领域的研究和应用已有几年的历史。与传统脉冲相比，使用编码激励的优点是提高了信噪比，最大限度地减少了患者对潜在生物效应的暴露，并且能够使用更高的超声频率。然而，与编码激励相关的主要问题是高旁瓣电平，这引入了旁瓣伪影。本文利用自适应波束形成技术抑制了编码激发超声成像系统的旁瓣效应，从而提高了系统的分辨率。仿真结果表明，将最小方差自适应波束形成器应用于啁啾激发超声成像系统，可以显著提高系统的信噪比和分辨率。
Coded excitation has been studied and applied to medical ultrasound for several years. The advantages of using coded excitation compared to the conventional pulses are improved SNR, minimized exposure of patients to potential biological effects, and the ability of using even higher ultrasonic frequencies. However, the major problem associated with coded excitation is the high side-lobe level which introduces the side-lobe artifacts. In this paper, we have utilized the adaptive beamforming to suppress the side-lobe effects and thus enhance the resolution in a coded excitation ultrasound imaging system. Simulation results showed that by applying minimum variance adaptive beamformer to a chirp-excited ultrasound imaging system, significant improvement in both SNR and resolution can be achieved.