%0 Journal Article
%T Wide-field-of-view ultrasound imaging based on mutual-information and quadratic transformation<br>基于互信息与二次方变换的超声宽景成像
%A XU Zi-juan
%A TAN Chao-wei
%A LIU Dong-quan
%A <br>许自娟
%A 谭朝炜
%A 刘东权
%J 计算机应用研究
%D 2011
%I 
%X Wide-field-of-view (WFOV) imaging method obtains an ultrasound image over an area much larger than normal ultrasound images. Because of the noise in ultrasound images and complicated tissue motions during images acquisition, utilized mutual-information and quadratic transformation to make the WFOV. Firstly, applied the mutual information based motion estimation method to the preprocessed Gaussian images to generate a filed of motion vectors. Secondly, improved these vectors by the angle based motion correction, and then used the quadratic transformation to estimate the nonrigid motion between images. Finally, applied nonlinear equations based polygon filling compounding method to gain the WFOV image. From experiments, the proposed method can generate a high quality WFOV image with improved signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR).
%K Gaussian smoothing
%K image registration
%K mutual information
%K motion estimation
%K motion vectors
%K quadratic transformation
%K spatial compounding
%K nonlinear equations<br>高斯滤波
%K 图像配准
%K 互信息
%K 运动估计
%K 运动向量
%K 二次方变换
%K 空间融合
%K 非线性方程组
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=8240383F08CE46C8B05036380D75B607&jid=A9D9BE08CDC44144BE8B5685705D3AED&aid=8F6853BAFBC498D60F13AB413809CFB5&yid=9377ED8094509821&vid=D3E34374A0D77D7F&iid=CA4FD0336C81A37A&sid=8C27CCA578E52082&eid=2E41258BCB9A7DB2&journal_id=1001-3695&journal_name=计算机应用研究&referenced_num=0&reference_num=13