最小方差波束形成与基于最小方差相干系数融合的超声成像方法  

Minimum variance beamforming combined with MV-Based coherence factor applied to medical ultrasound imaging

作　　者：王平[1] 许琴[1] 范文政[1] 高阳[1] 何为[1] 陈民铀[1] 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400044

出　　处：《重庆大学学报（自然科学版）》2013年第1期81-85,共5页Journal of Chongqing University

基　　金：广东省教育部产学研结合项目(2008B090500272);重庆大学研究生科技创新基金资助项目(CDJXS11150009);第四届国家大学生创新性实验项目(101061117)

摘　　要：在医学超声成像中,最小方差波束形成(MV)可以有效地提高图像的分辨率,但不能提高成像的对比度。针对最小方差波束形成的低对比度,提出一种最小方差波束形成与基于最小方差相干系数融合的成像方法。该方法利用最小方差波束形成的输出取代相干系数中相干部分的能量和,得到加权系数,然后利用该系数加权最小波束形成的结果。仿真成像结果表明:该方法在分辨率、对比度方面都优于传统的延时叠加波束形成法,最小方差波束形成法以及最小方差波束形成与相干系数融合的方法。In medical ultrasonic imaging, minimum variance beamforming （MV）can effectively improve imaging resolution, but the contrast is not improved. By considering the low contrast of minimum variance beamforming, a medical imaging method combined minimum variance beamforming and MV-based coherence factor is presented. First, the coherent sum in coherence factor is replaced by the output of MV to obtain weighting factor; and then the factor is used to weight the results of minimum variance beamforming. The simulated results indicate that the proposed method in the aspects of resolution and contrast is better than traditional delay and sum, minimum variance beamforming and medical imaging method combining minimum variance beamforming and coherence factor.

关 键 词：超声成像 最小方差 波束形成 相干系数 延时叠加 

分 类 号：TB553[理学—物理]