基于多线接收的延时乘累加超声波束形成算法

基于超声成像对于高帧频的需求特性，提出了一种基于多线接收的延时乘累加(multi-line acquisition delay multiply and sum， MLADMAS)超声波束形成算法.该算法首先借助于多线接收技术，由一条传输线得到多条合成传输线，再利用复杂度更低的延时乘累加算法，并行进行波束形成操作，以得到多条接收线输出结果.仿真实验结果表明，与传统的延时叠加算法相比，MLADMAS算法能在将帧频提高两倍的同时，得到质量更好的图像，其评价指标FWHM，PSL和CR分别提高了28.49%，26.29%，26.06%.当使用幅度变迹时，MLADMAS算法的性能进一步改善.

Delay Multiply and Sum Beamforming Algorithm for Ultrasound Based on Multi-line Acquisition

Based on the high frame rate demand of ultrasound imaging， a beamforming algorithm based on multi-line acquisition delay multiply and sum(MLADMAS) was proposed. This algorithm was based on a method named multi-line acquisition; there are more than one receiving lines from a single transmission line， then the lower complexity DMAS beamforming was used in parallel to obtain several receiving lines simultaneously. The simulated results showed that the frame rate of MLADMAS was 2 times higher than that of DAS with a better image quality. The quantitative indexes FWHM， PSL and CR were improved by 28.49%， 26.29% and 26.06%， respectively. The image quality could be further improved when apodization was applied.