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Cardiac motion assessement from echocardiographic image sequences by means of the structure multivector

Martino Alessandrini 1 Adrian Basarab 2, 3 Hervé Liebgott 1 Olivier Bernard 4
1 Imagerie Ultrasonore
CREATIS - Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé
2 IRIT-TCI - Traitement et Compréhension d’Images
IRIT - Institut de recherche en informatique de Toulouse
4 Images et Modèles
CREATIS - Centre de Recherche en Acquisition et Traitement de l'Image pour la Santé
Abstract : We recently contributed an algorithm for the estimation of cardiac deformation from echocardiographic image sequences based on the monogenic signal. By exploiting the phase information instead of the pixel intensity, the algorithm was robust to the temporal contrast variations normally encountered in cardiac ultrasound. In this paper we propose an improvement of that framework making use of an extension of the monogenic signal formalism, called structure multivector. The structure multivector models the image as the superposition of two perpendicular waves with associated amplitude, phase and orientation. Such a model is well adapted to describe the granular pattern of the characteristic speckle noise. The displacement is computed by solving the optical flow equation jointly for the two image phases. A local affine model accounts for typical cardiac motions as contraction/expansion and shearing; a coarse-to-fine B-spline scheme allows for a robust and effective computation of the model parameters and a pyramidal refinement scheme helps deal with large motions. Performance was evaluated on realistic simulated cardiac ultrasound sequences and compared to our previous monogenic-based algorithm and classical speckle tracking. Endpoint-error was used as accuracy metric. With respect to them we achieved error reductions of 13% and 30% respectively.
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Martino Alessandrini, Adrian Basarab, Hervé Liebgott, Olivier Bernard. Cardiac motion assessement from echocardiographic image sequences by means of the structure multivector. IEEE International Ultrasonics Symposium - US 2013, Jul 2013, Prague, Czech Republic. pp. 1541-1544, ⟨10.1109/ULTSYM.2013.0392⟩. ⟨hal-01147282⟩

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