Zahiri-Azar Reza, Salcudean Septimiu E
Robotics and Control Laboratory, Department of Electrical and Computer Engineering, University of British Columbia, Vancouver, BC V6T 1Z4, Canada.
IEEE Trans Biomed Eng. 2006 Oct;53(10):1990-2000. doi: 10.1109/TBME.2006.881780.
In this paper we introduce a new speckle tracking method that is based on the standard time-domain cross correlation strain estimation (TDE). We call this method time-domain cross-correlation with prior estimates (TDPE), because it uses prior displacement estimates of neighboring windows to speed up computation. TDPE has all the advantages of TDE, but is much faster. Simulations, as well as experiments with phantoms and tissue, indicate that TDPE is capable of reliably estimating tissue displacement and strain over a large range of displacements in real time. The computational efficiency of TDPE is compared with current time-efficient methods that have been used in real time strain imaging systems. The results show that TDPE is the most time efficient algorithm to date, and is roughly 10 times faster than the TDE. The implementation of TDPE on an Ultrasonix RP500 ultrasound machine runs at 30 fps for strain images of 16000 pixels.
在本文中，我们介绍了一种基于标准时域互相关应变估计（TDE）的新散斑跟踪方法。我们将此方法称为带先验估计的时域互相关（TDPE），因为它使用相邻窗口的先验位移估计来加速计算。TDPE具有TDE的所有优点，但速度要快得多。模拟以及使用体模和组织的实验表明，TDPE能够在大范围位移内实时可靠地估计组织位移和应变。将TDPE的计算效率与实时应变成像系统中使用的当前高效时间方法进行了比较。结果表明，TDPE是迄今为止时间效率最高的算法，比TDE快约10倍。在Ultrasonix RP500超声机器上实现的TDPE，对于16000像素的应变图像，运行速度为30帧/秒。
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