本文選題：彈性成像 + 先驗估計　； 參考：《聲學學報》2016年05期

【摘要】：準靜態(tài)彈性成像技術是基于組織壓縮前和壓縮后超聲回波射頻信號進行組織運動重構的彈性成像技術。提出了一種基于先驗估計的自適應窗函數算法,在位移估計過程中,使用已估計的臨近窗的時延值作為先驗信息,自動調整截取壓縮后射頻信號段的截取窗函數,提高了互相關運算所需的壓縮前和壓縮后信號段之間的相關性。仿真實驗結果表明,該算法不僅大大提高了成像速度,而且提高了信噪比較低時的成像質量,同時該算法具有更寬的應變通帶。
[Abstract]:The quasi-static elastic imaging technique is an elastic imaging technique based on the radio-frequency signals of ultrasonic echo before and after tissue compression for tissue motion reconstruction.In this paper, an adaptive window function algorithm based on prior estimation is proposed. In the process of displacement estimation, the estimated time delay of the adjacent window is used as the prior information to automatically adjust the intercepting window function of the truncated RF signal segment.The correlation between pre-compression and post-compression signals required for cross-correlation operation is improved.The simulation results show that the algorithm not only improves the imaging speed, but also improves the imaging quality when the signal-to-noise ratio is low. At the same time, the algorithm has wider strain-pass band.
【作者單位】： 近代聲學教育部重點實驗室南京大學聲學研究所;
【基金】：國家重點基礎研究發(fā)展計劃(2012CB921504) 國家自然科學基金(11274166) 聲場聲信息國家重實驗室開放課題(SKLA201609)資助
【分類號】：TB559;TN911.7
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本文編號：1766164