CAJ | 학술논문

结合位移位置估计提出位移场修正方法来抑制弹性成像幅度调制噪声。先用位移位置估计算法估计出位移位置，然后利用位置值使用线性插值法将位移修正到估计窗中心点，再使用梯度操作进行应变估计产生最终的弹性图像。基于位置估计的位移场修正法产生的弹性图像信噪比有显著的提高，在不同窗长和应变成像情况下，均优于幅度log压缩算法和幅度调制修正AMC算法。该方法更能有效地抑制弹性成像幅度调制噪声。
결합위이위치고계제출위이장수정방법래억제탄성성상폭도조제조성。선용위이위치고계산법고계출위이위치，연후이용위치치사용선성삽치법장위이수정도고계창중심점，재사용제도조작진행응변고계산생최종적탄성도상。기우위치고계적위이장수정법산생적탄성도상신조비유현저적제고，재불동창장화응변성상정황하，균우우폭도log압축산법화폭도조제수정AMC산법。해방법경능유효지억제탄성성상폭도조제조성。
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.