Motion Estimation in Ultrasound Images Using Time Domain Cross Correlation With Prior Estimates

TitleMotion Estimation in Ultrasound Images Using Time Domain Cross Correlation With Prior Estimates
Publication TypeJournal Article
Year of Publication2006
AuthorsZahiri-Azar, R., and S. E. Salcudean
JournalBiomedical Engineering, IEEE Transactions on
Pagination1990 -2000
Date Publishedoct.
Keywordsbiological tissues, biomechanics, biomedical ultrasonics, medical image processing, motion estimation, phantoms, prior estimates, speckle tracking method, time-domain analysis, time-domain cross correlation strain estimation, tissue displacement, ultrasound images

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 16 000 pixels


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