3-D Intraventricular Vector Flow Mapping Using Triplane Doppler Echo

Vixège, Florian; Bérod, Alain; Nicoud, Franck; Courand, Pierre-Yves; Vray, Didier; Garcia, Damien

doi:10.1007/978-3-030-78710-3_56

Cited by 1 publication

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References 18 publications

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“…In this paper, we introduce a 3D iVFM technique based on triplane Doppler-echo, which generalizes the 2D iVFM developed by Assi et al (2017) and Vixège et al (2021b). An incomplete version was briefly presented in a proceeding (Vixège et al 2021a). The 3D-iVFM approach allows the echographer to estimate the 3D intraventricular flow from three color-Doppler planes, by using a minimization problem constrained by hemodynamic properties (mass conservation in the cardiac cavity, and free-slip boundary conditions on the endocardium).…”

Section: Introductionmentioning

confidence: 99%

Full-volume three-component intraventricular vector flow mapping by triplane color Doppler

Vixège¹,

Bérod²,

Courand³

et al. 2022

Phys. Med. Biol.

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Objective. Intraventricular vector flow mapping (iVFM) is a velocimetric technique for retrieving two-dimensional velocity vector fields of blood flow in the left ventricular cavity. This method is based on conventional color Doppler imaging, which makes iVFM compatible with the clinical setting. We have generalized the iVFM for a three-dimensional reconstruction (3D-iVFM). Approach. 3D-iVFM is able to recover three-component velocity vector fields in a full intraventricular volume by using a clinical echocardiographic triplane mode. The 3D-iVFM problem was written in the spherical (radial, polar, azimuthal) coordinate system associated to the six half-planes produced by the triplane mode. As with the 2-D version, the method is based on the mass conservation, and free-slip boundary conditions on the endocardial wall. These mechanical constraints were imposed in a least-squares minimization problem that was solved through the method of Lagrange multipliers. We validated 3D-iVFM in silico in a patient-specific CFD (computational fluid dynamics) model of cardiac flow and tested its clinical feasibility in vivo in patients and in one volunteer. Main results. The radial and polar components of the velocity were recovered satisfactorily in the CFD setup (correlation coefficients, r = 0.99 and 0.78). The azimuthal components were estimated with larger errors (r = 0.57) as only six samples were available in this direction. In both in silico and in vivo investigations, the dynamics of the intraventricular vortex that forms during diastole was deciphered by 3D-iVFM. In particular, the CFD results showed that the mean vorticity can be estimated accurately by 3D-iVFM. Significance. Our results tend to indicate that 3D-iVFM could provide full-volume echocardiographic information on left intraventricular hemodynamics from the clinical modality of triplane color Doppler.

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Section: Introductionmentioning

confidence: 99%