2018
DOI: 10.3390/app8030429
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A PSF-Shape-Based Beamforming Strategy for Robust 2D Motion Estimation in Ultrafast Data

Abstract: This paper presents a framework for motion estimation in ultrafast ultrasound data. It describes a novel approach for determining the sampling grid for ultrafast data based on the system's point-spread-function (PSF). As a consequence, the cross-correlation functions (CCF) used in the speckle tracking (ST) algorithm will have circular-shaped peaks, which can be interpolated using a 2D interpolation method to estimate subsample displacements. Carotid artery wall motion and parabolic blood flow simulations toget… Show more

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Cited by 12 publications
(10 citation statements)
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“…This paper focuses on the estimation accuracy of the block matching method based on a correlation function, [9][10][11][12][13][14][15][16] which is one of the most common techniques for 2D vector blood flow imaging. Several research groups have developed the multi-level block matching method.…”
Section: Introductionmentioning
confidence: 99%
“…This paper focuses on the estimation accuracy of the block matching method based on a correlation function, [9][10][11][12][13][14][15][16] which is one of the most common techniques for 2D vector blood flow imaging. Several research groups have developed the multi-level block matching method.…”
Section: Introductionmentioning
confidence: 99%
“…For highly accurate displacement estimation, the raw RF data instead of the demodulated RF data were used for the block-matching operation in this final iteration. Furthermore, the peak positions of the normalized cross-correlation functions were estimated on a subsample scale by 2D cubic interpolation of the cross-correlation peak ( Saris et al, 2018 ). No filtering was performed after the last iteration.…”
Section: Methodsmentioning
confidence: 99%
“…As an alternative, novel ultrafast ultrasound imaging techniques, with up to 10.000 images/sec, could be used to estimate blood flow velocity vectors within the carotid artery. 6,7 The feasibility of this method has previously been shown in the carotid artery bifurcation of both healthy subjects and patients, with a proven reproducibility for the estimated velocity fields. 8 The further development of this technique might facilitate the implementation of flowbased decision making in clinical practice.…”
mentioning
confidence: 93%