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Title:: Ultrasound virtual source imaging weighted by generalcoherence factor weighting

Author(s):: HE Qing; WANG Yazhong; ZHENG Chichao; PENG Hu; Hefei University of Technology，Hefei 230009,China

Keywords:: Ultrasound imaging; Virtual source imaging; Synthetic aperture; Adaptive weighting factor; General coherence factor

摘要:: 超声虚拟源成像相对于传统的聚焦成像和合成孔径成像，使阵列孔径在虚拟意义上得到了扩大，增加了探测深度，提高图像对比度。自适应加权成像技术能够根据回波信号本身的特征进行动态加权，提升成像质量。本研究将广义相干系数（general coherence factor, GCF）与虚拟源成像（virtual source imaging，VS）相结合，提出GCF加权的VS成像算法（GCF-VS），进一步提高虚拟源成像效果。Field II仿真和实验结果证明该算法相对于传统的VS成像和相干系数（ coherence factor,CF）加权的VS成像，具有更高的成像质量。

Abstract:: Compared with traditional focused imaging and synthetic aperture imaging, ultrasound virtual source imaging expands the array aperture in virtual sense, which increases the depth of detection and improves the image contrast. Adaptive weighted imaging technology can dynamically weight the echo signal according to the characteristics so that improving the image quality. In this paper, the General Coherence Factor (GCF) and Virtual Source Imaging (VS) were combined to propose a GCF weighted VS imaging algorithm (GCF-VS) to further improve the virtual source imaging quality. Field II simulation results and experimental results show that the proposed algorithm has higher imaging quality than traditional VS imaging and CF-VS.