摘要： 传统合成聚焦超声成像方法在图像重建过程中处理数据量较大，致使其在便携式B型超声设备中应用受限。针对该问题，提出一种基于压缩感知理论和合成聚焦波束形成算法的便携式B型超声成像方法(SFCS)。该方法通过对接收到的射频回波信号进行随机采样得到欠采样的测量信号，将测量信号经过合成聚焦波束形成处理获得欠采样的射频信号线，基于压缩感知的信号重构算法，由欠采样的射频信号线高质量地恢复信号后供后续成像处理使用。仿真实验结果表明，SFCS可有效地解决合成聚焦超声成像过程中数据量大的问题，从而在保证较高成像质量的前提下满足便携式B型超声设备小型化、低成本的技术要求，具有工程应用价值。

关键词: 便携式B型超声, 合成聚焦, 压缩感知, 约束等距准则, 非均匀采样, 正交匹配追踪

Abstract: In order to solve the problem that Synthetic Focusing(SF) ultrasound imaging method, which needs dealing with large amount of data in image reconstruction process, is restricted when applied into portable B-mode ultrasound equipments, this paper proposes a portable B-mode ultrasound imaging method named SFCS based on compressive sensing theory and SF beam forming algorithm. By using traditional SF beam forming method, subsampled RF lines can be acquired from the subsampled measurement signal that is random sampled from raw RF echo signal. Based on compressive sensing theory, RF lines can be reconstructed from the subsampled ones for subsequent imaging processing. Simulation result shows that SFCS can effectively address the data size problem that SF ultrasound imaging always confronts. Since SFCS can meet the requirement that portable B-mode ultrasound equipment must be miniaturization and low cost, it has practical engineering application value.

Key words: portable B-mode ultrasound, Synthetic Focusing(SF), compressive sensing, restricted isometry principle, nonuniform sampling, orthogonal matching pursuit

中图分类号: 

• TP391.41