On the investigation of autocorrelation-based vector Doppler method with plane wave imaging

H Hasegawa, M Omura… - IEEE Transactions on …, 2022 - ieeexplore.ieee.org
Although color flow imaging is one of the representative applications of the Doppler method,
it can estimate only the velocity component in the direction of ultrasonic propagation, that is …

Two-Dimensional Wavenumber Analysis Implemented in Ultrasonic Vector Doppler Method with Focused Transmit Beams

H Hasegawa, M Omura, R Nagaoka, K Saito - Sensors, 2022 - mdpi.com
The multi-angle Doppler method was introduced for the estimation of velocity vectors by
measuring axial velocities from multiple directions. We have recently reported that the …

Doppler angle estimation using correlation

PC Li, CJ Cheng, CC Shen - IEEE transactions on ultrasonics …, 2000 - ieeexplore.ieee.org
Conventional Doppler techniques can only detect the axial component of blood flow. To
obtain the transverse flow component, an approach based on the dependence of Doppler …

Measurement of flow velocity vectors in carotid artery using plane wave imaging with repeated transmit sequence

H Hasegawa, M Mozumi, M Omura, R Nagaoka… - Journal of Medical …, 2021 - Springer
Purpose Doppler-based methods are widely used for blood flow imaging in clinical settings.
However, they inherently estimate the velocity component only in the axial direction …

Real-time three-dimensional velocity vector measurement using the weighted phase gradient method

NNN Nitta, TST Shiina - Japanese Journal of Applied Physics, 1998 - iopscience.iop.org
Although the technique for measuring blood flow based on the ultrasonic Doppler method is
an important means for clinical diagnosis, it is inappropriate for quantitative assessment of …

Simultaneous quantification of flow and tissue velocities based on multi-angle plane wave imaging

IK Ekroll, A Swillens, P Segers, T Dahl… - IEEE transactions on …, 2013 - ieeexplore.ieee.org
A quantitative angle-independent 2-D modality for flow and tissue imaging based on multi-
angle plane wave acquisition was evaluated. Simulations of realistic flow in a carotid artery …

An axial velocity estimator for ultrasound blood flow imaging, based on a full evaluation of the Doppler equation by means of a two-dimensional autocorrelation …

T Loupas, JT Powers, RW Gill - IEEE transactions on ultrasonics …, 1995 - ieeexplore.ieee.org
This paper introduces a new velocity estimator, referred to as the 2D autocorrelator, which
differs from conventional Doppler techniques in two respects: the derivation of axial velocity …

Time domain formulation of pulse-Doppler ultrasound and blood velocity estimation by cross correlation

O Bonnefous, P Pesque - Ultrasonic imaging, 1986 - Elsevier
The Doppler effect is usually described as a frequency shift of the backscattered signals from
moving targets with respect to the frequency transmitted. Recently, real-time blood flow …

An automatic angle tracking procedure for feasible vector Doppler blood velocity measurements

P Tortoli, A Dallai, E Boni, L Francalanci… - Ultrasound in medicine & …, 2010 - Elsevier
Two-dimensional angle-independent blood velocity estimates typically combine the Doppler
frequencies independently measured by two ultrasound beams with known interbeam …

Doppler angle and flow velocity estimations using the classic and transverse Doppler effects

BR Lee, HK Chiang, CD Kuo, WL Lin… - IEEE transactions on …, 1999 - ieeexplore.ieee.org
Current clinical Doppler ultrasound systems could only measure the flow vector parallel to
the ultrasound beam axis, and the knowledge of the Doppler angle (beam-to-flow angle) is …