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Ultrasonic elastography is an imaging technique of obtaining tissue relative stiffness information. This imaging modality has been shown to be useful in different clinical applications such as tumor detection. Many algorithms for elastography have been presented recently; However, most of them are either inefficient for real-time or not robust for general clinical applications. In this paper we develop...
Ultrasound elastography is a kind of technique of obtaining the tissue relative stiffness information, which plays an important role in early tumor diagnosis. The increases in overlap between the data segments on the order of 90% or higher are essential to improve axial resolution in elastogaphy. However, correlated errors in displacement estimates increase dramatically with the increase in the overlap,...
The axial- and the lateral- guidance motion tracking are efficient approaches for real-time strain imaging; however, they are suffering from error propagation. This paper introduces a novel multi-direction guidance (MDG) motion tracking algorithm which selects higher quality previous estimations from multi-directions as seed displacement of the next estimated location. Experiment results show that...
In ultrasound strain imaging, random fluctuations of the signal amplitude result in a match only occurred at certain regions from pre- and post-compression window pairs. This produces amplitude modulation (AM) strain noise. In this paper a new suppressing amplitude modulation method called displacement filed correction (DFC) is presented. Both simulation and phantom experiment demonstrate that the...
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