In ultrasound strain and elasticity imaging, an accurate and cost-effective sub-pixel displacement estimator is required because strain/elasticity imaging quality relies on the displacement SNR, which can often be higher if more computational resources are provided. In this paper, we introduce an autocorrelation-based method to cost-effectively improve subpixel displacement estimation quality. To quantitatively evaluate the performance of the autocorrelation method, simulated and tissue-mimicking phantom experiments were performed. The computational cost of the autocorrelation method is also discussed. The results of our study suggest the autocorrelation method can be used for a real-time elasticity imaging system.
|Number of pages||6|
|Journal||IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control|
|State||Published - Apr 2011|
Bibliographical noteFunding Information:
Manuscript received october 16, 2009; accepted January 13, 2011. This work was supported in part by national Institutes of Health under Grant EB 004963 and Hl 091609. s. Kim, s. r. aglyamov, and s. y. Emelianov are with the University of Texas, Biomedical Engineering department, austin, TX (e-mail: email@example.com). s. park is with GE Global research, Ultrasound and Biomedical Imaging laboratory, niskayuna, ny. M. o’donnell is with the University of Washington, Bioengineering department, seattle, Wa. digital object Identifier 10.1109/TUFFc.2011.1876