Recent advances in blood flow vector velocity imaging

Jensen, Jørgen Arendt; Nikolov, Svetoslav Ivanov; Udesen, Jesper; Munk, Peter; Hansen, Kristoffer Lindskov; Pedersen, Michael Ingemann; Hansen, P.; Nielsen, Michael Bachmann; Oddershede, N.; Kortbek, Jacob; Pihl, Michael Johannes; Li, Ye

doi:10.1109/ultsym.2011.0064

Cited by 19 publications

(11 citation statements)

References 43 publications

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“…A similar multiple-angle approach can also be implemented with a single array using beam-steering (Fadnes et al 2015). Another technique that was introduced is the transverse oscillation method (Jensen and Munk 1998;Jensen et al 2011). In this method the ultrasound pulse (as shown in e.g.…”

Section: Doppler Methodsmentioning

confidence: 99%

Ultrasound Imaging Velocimetry: a review

Poelma

2016

Exp Fluids

107

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Section: Doppler Methodsmentioning

confidence: 99%

Ultrasound Imaging Velocimetry: a review

Poelma

2016

Exp Fluids

107

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“…Also, the Doppler effect has a strong angular dependence (cos θ) as illustrated by Figure 11.1. Jensen (Evans, Jensen, & Nielsen, 2011;Jensen et al, 2011) has pointed out that laminar flow does not v beam 5 jvjcosθ 5 f D c 0 f 0 2 (11.36) (Evans et al, 2011). Imaging systems do not have the capability to anticipate the angle between the insonifying beam and the actual attitude of the vessel; therefore the angle correction is unlikely to be accurate.…”

Section: Doppler Methods Re-examinedmentioning

confidence: 99%

“…Finally, the TO method was brought to a commercial scanner Jensen et al, 2011;. Practical advantages of implementing the TO approach are that the velocity information is derived from the same transmit beams and pulse sequence, and similar Hilbert transform and autocorrelation algorithms are used for both directions.…”

Section: Transverse Oscillation Methodsmentioning

confidence: 99%

“…Previous methods for obtaining vector Doppler, which are more limited in their applicability, are reviewed in Evans et al (2011);Jensen et al (2011);Mace et al, (2013); and Udesen and Jensen (2006). These methods, which include synthetic aperture and plane-wave compounding, will be emphasized as well as a another one, transverse oscillation.…”

Section: Introductionmentioning

confidence: 99%

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Doppler Modes

Szabo

2014

Diagnostic Ultrasound Imaging: Inside Out

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“…This allows for imaging at ultrafast frame rates in the kHz range. Hereby, decorrelation of speckle can be minimized and fast moving, sometimes short-lived, motion patterns can be tracked [28][29][30][31][32]. However, frame-to-frame tissue displacements become smaller, since they scale with the imaging frame rate.…”

Section: Introductionmentioning

confidence: 99%

A PSF-Shape-Based Beamforming Strategy for Robust 2D Motion Estimation in Ultrafast Data

et al. 2018

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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 together with rotating disk experiments using a Verasonics Vantage 256 are used for performance evaluation. Zero-degree plane wave data were acquired using an ATL L5-12 (f c = 9 MHz) transducer for a range of pulse repetition frequencies (PRFs), resulting in 0-600 µm inter-frame displacements. The proposed methodology was compared to data beamformed on a conventionally spaced grid, combined with the commonly used 1D parabolic interpolation. The PSF-shape-based beamforming grid combined with 2D cubic interpolation showed the most accurate and stable performance with respect to the full range of inter-frame displacements, both for the assessment of blood flow and vessel wall dynamics. The proposed methodology can be used as a protocolled way to beamform ultrafast data and obtain accurate estimates of tissue motion.

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Recent advances in blood flow vector velocity imaging

Cited by 19 publications

References 43 publications

Ultrasound Imaging Velocimetry: a review

Ultrasound Imaging Velocimetry: a review

Doppler Modes

A PSF-Shape-Based Beamforming Strategy for Robust 2D Motion Estimation in Ultrafast Data

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