电子科技大学学报Issue(2)：306-310,5.DOI:10.3969/j.issn.1001-0548.2014.02.029
位移场修正法抑制弹性成像幅度调制噪声
Suppressing Amplitude Modulation Noise by Using Displacement Field Correction based on Displacement Location Estimation
摘要
Abstract
Elastography based on pre-and post-compression signal window matching will generate amplitude modulation (AM) noise because of signal amplitude random fluctuation. On the basis of displacement location estimation, this paper proposes a displacement field correction (DFC) method to suppress AM noise. Firstly, the displacement locations are estimated by using the displacement location estimation algorithm. Then the displacement estimates are corrected by using the linear interpolation on the basis of displacement location estimates. Finally, the strains are estimated by using gradient operation and mapped into a grayscale image. Elastogram using the displacement field correction method has less AM noise significantly. The proposed method has the highest performance than signal amplitude log-compression (ALC) and amplitude modulation correction (AMC) at various strains or window-lengths. The DFC based on displacement location estimation can efficiently suppress AM noise.关键词
幅度调制噪声/位移场修正/位移位置估计/弹性成像/超声Key words
amplitude modulation noise/displacement field correction/displacement location estimation/elastography/ultrasound分类
信息技术与安全科学引用本文复制引用
崔少国,彭彩碧,杨宏雨..位移场修正法抑制弹性成像幅度调制噪声[J].电子科技大学学报,2014,(2):306-310,5.基金项目
重庆市科委自然科学基金(cstc2012jjA40030)；重庆市教委科学技术研究项目(KJ130826)；国家自然科学基金(61202348) （cstc2012jjA40030）
