Bijnens, BartPorras Pérez, Antonio ReyesAlessandrini, MartinoCraene, Mathieu deDuchateau, NicolasSitges, MartaDelingette, HervéSermesant, MaximeD'hooge, JanFrangi Caregnato, AlejandroPiella Fenoy, Gemma2017-02-272017-02-272014Porras AR, Alessandrini M, De Craene M, Duchateau N, Sitges M, Bijnens B, Delingette H, Sermesant M, D'hooge J, Frangi AF, Piella G. Improved myocardial motion estimation combining tissue Doppler and B-mode echocardiographic images. IEEE Trans Med Imaging. 2014;33(11):2098-106. DOI: 10.1109/TMI.2014.23313920278-0062http://hdl.handle.net/10230/28143We propose a technique for myocardial motion estimation based on image registration using both B-mode echocardiographic images and tissue Doppler sequences acquired interleaved. The velocity field is modeled continuously using B-splines and the spatiotemporal transform is constrained to be diffeomorphic. Images before scan conversion are used to improve the accuracy of the estimation. The similarity measure includes a model of the speckle pattern distribution of B-mode images. It also penalizes the disagreement between tissue Doppler velocities and the estimated velocity field. Registration accuracy is evaluated and compared to other alternatives using a realistic synthetic dataset, obtaining mean displacement errors of about 1 mm. Finally, the method is demonstrated on data acquired from six volunteers, both at rest and during exercise. Robustness is tested against low image quality and fast heart rates during exercise. Results show that our method provides a robust motion estimate in these situations.application/pdfeng© 2014 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. The final published article can be found at http://dx.doi.org/10.1109/TMI.2014.2331392info:eu-repo/semantics/articlehttp://dx.doi.org/10.1109/TMI.2014.2331392Ultrasound (US)EchocardiographyFree form deformation (FFD)Image registrationMotion estimationMulti-modal integrationTemporal diffeomorphic free form deformation (TDFFD)Tissue DopplerDoppler effectImagingTransformsSplines (mathematics)Velocity measurementTransducersMyocardiuminfo:eu-repo/semantics/openAccess