title: Spatiotemporal registration of multiple three-dimensional echocardiographic recordings for enhanced field of view imaging.
abstract: The use of three-dimensional (3-D) echocardiography is limited by signal dropouts and narrow field of view. Data compounding is proposed as a solution to overcome these limitations by combining multiple 3-D recordings to form a wide field of view. The first step of the solution requires registration between the recordings both in the spatial and temporal dimension for dynamic organs such as the heart. Accurate registration between the individual echo recordings is crucial for the quality of compounded volumes. A temporal registration method based on a piecewise one-dimensional cubic B-spline in combination with multiscale iterative Farnebäck optic flow method for spatial registration was described. The temporal registration method was validated on in vivo data sets with annotated timing of mitral valve opening. The spatial registration method was validated using in vivo data and compared to registration with Procrustes analysis using manual contouring as a benchmark. The spatial accuracy was assessed in terms of mean of absolute distance and Hausdorff distance between the left ventricular contours. The results showed that the temporal registration accuracy is in the range of half the time resolution of the echo recordings and the achieved spatial accuracy of the proposed method is comparable to manual registration.
authors.affiliation: GE Vingmed Ultrasound, Gaustadalléen 21, Oslo 0349, Norway; KU Leuven, Department of Cardiovasular Sciences, Cardiovascular Imaging and Dynamics Lab, UZ Herestraat 49, Box 7003, Leuven 3000, Belgium.
authors.forename: Adriyana
authors.initials: A
authors.lastname: Danudibroto
authors.affiliation: GE Vingmed Ultrasound, Gaustadalléen 21, Oslo 0349, Norway; University of Oslo, Department of Informatics, Gaustadalléen 23 B, Oslo 0373, Norway.
authors.forename: Jørn
authors.initials: J
authors.lastname: Bersvendsen
authors.affiliation: GE Vingmed Ultrasound , Gaustadalléen 21, Oslo 0349, Norway.
authors.forename: Olivier
authors.initials: O
authors.lastname: Gérard
authors.affiliation: KU Leuven , Department of Cardiovasular Sciences, Cardiovascular Imaging and Dynamics Lab, UZ Herestraat 49, Box 7003, Leuven 3000, Belgium.
authors.forename: Oana
authors.initials: O
authors.lastname: Mirea
authors.affiliation: KU Leuven , Department of Cardiovasular Sciences, Cardiovascular Imaging and Dynamics Lab, UZ Herestraat 49, Box 7003, Leuven 3000, Belgium.
authors.forename: Jan
authors.initials: J
authors.lastname: D'hooge
authors.affiliation: KU Leuven , Department of Cardiovasular Sciences, Cardiovascular Imaging and Dynamics Lab, UZ Herestraat 49, Box 7003, Leuven 3000, Belgium.
authors.forename: Eigil
authors.initials: E
authors.lastname: Samset
keywords: multiscale iterative optic flow; rigid registration; spatial alignment; temporal alignment; three-dimensional Farnebäck; three-dimensional echocardiography