期刊文献+

基于先验估计和相关相位的实时超声弹性成像 被引量:6

Real-time Ultrasonic Strain Imaging by Prior Estimation and Correlation Phase
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摘要 基于互相关技术的经典超声弹性成像算法,采用启发式穷举搜索和插值法来提高成像速度和位移估计精度,但实时性和估计精度有限。本研究提出一种新算法,在运动追踪阶段使用先验估计加速追踪收敛速度,然后使用复互相关函数的相位进行亚采样点级精度位移估计,避免了启发式穷举搜索以及插值法所带来的较大计算代价。仿真和体模实验表明,新算法与经典的互相关形变估计算法相比,不仅成像速度大大提高,而且形变估计精度也有显著改善。以仿真的1%应变为例,抛物线插值法生成的弹性图像SNRe为4.8,而新算法生成的弹性图SNRe为11.3。结果证明提出的新算法是一种正确可行的高精度实时超声弹性成像方法。
出处 《中国生物医学工程学报》 CAS CSCD 北大核心 2011年第4期636-640,共5页 Chinese Journal of Biomedical Engineering
基金 湖北医药学院中青年基金2009ZQN3
关键词 相关相位 运动追踪 先验估计 实时 弹性成像 correlation phase motion tracking prior estimation real-time strain image
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参考文献8

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同被引文献64

  • 1王彬,凌涛,沈勇,郑海荣,李发琪.提高准静态弹性成像运动估计精度的算法及其仿体实验研究[J].中国医学物理学杂志,2011,28(3):2668-2673. 被引量:2
  • 2高广珠,李忠武,余理富,何智勇.归一化互相关系数在图像序列目标检测中的应用[J].计算机工程与科学,2005,27(3):38-40. 被引量:17
  • 3罗建文,白净.超声弹性成像的研究进展[J].中国医疗器械信息,2005,11(5):23-31. 被引量:150
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