3D Strain Assessment in Ultrasound (STRAUS)
The STRAUS project aims at introducing a reliable unified pipeline for the in silico evaluation and comparison of 3D speckle tracking solutions. This effort started with the organization of the Motion Tracking Challenge at MICCAI 2012, where a new pipeline for the simulation of 3D ultrasound recording was developed and used to contrast five motion tracking solutions from 5 leading groups in the field. The simulation pipeline combined state of the art solutions in the fields of electromechanical modeling and ultrasound simulations to obtain realistic motion patterns and speckle properties. Results of that comparison study are reported in  and more extensively in .
Building from that initial effort we have recently developed a novel simulation protocol with an original solution to learn speckle texture from a real ultrasound recording. Unlike existing solutions, the so obtained simulated images fairly included all major elements that make motion tracking in ultrasound still challenging as:
- Motion of surrounding structures as papillary muscles and valves;
- Heterogeneities of speckle contrast inside the myocardium;
- Speckle decorrelation over time.
For a description of the simulation framework see  and .
The new pipeline was used to generate an initial library of 8 sequences including healthy and pathological cases. For each sequence B-mode voxel data, RF signals and ground truth meshes are made freely available for download (see below).
A web-based interface to visualize and navigate through the synthetic datasets can be found at: https://desk.creatis.insa-lyon.fr/straus/
Please note that the use of such data is citation-ware. Hereto  should be properly referenced.
Open Access Dataset
For each dataset the following are available:
- B-mode simulated voxel data (.mhd)
- RF signals (.mat)
- The set of ground truth meshes (.vtk)
- together with some MATLAB functions to read and align B-mode, RF and ground truth meshes. All data and routines can be downloaded here: http://www-sop.inria.fr/asclepios/data/STRAUS/.
Results from a first comparison study
We have used the synthetic datasets to run a comparison study between 5 state-of-the art speckle tracking algorithms from academia and industry. The techniques considered are heterogeneous in terms of methodology (i.e. elastic registration vs. block matching vs. optical flow) and data used (i.e. b-mode voxel data vs. raw radiofrequency signals). The results of the comparison are reported in .
The data used is the one of the open access dataset, presented above. For reproducibility, we make the following available for download at this link:
- The results obtained by each participant;
- The MATLAB scripts used to compute the error metrics and reproduce the figures contained in the paper ;
The provided scripts should be used to benchmark new techniques and compare directly with what reported in .
 M. De Craene, P. Allain, H. Gao, A. Prakosa, S. Marchesseau, L. Hilpert, O. Somphone, H. Delingette, S. Makram-Ebeid, N. Villain, J. D’hooge, M. Sermesant, and E. Saloux, “Computational and Physical Phantom Setups for the Second Cardiac Motion Analysis Challenge (cMAC2),” in STACOM. New York: Springer, 2012, vol. 7746, LNCS, pp. 125–133.
 De Craene, M.; Marchesseau, S.; Heyde, B.; Gao, H.; Alessandrini, M.; Bernard, O.; Piella, G.; Porras, A.R.; Tautz, L.; Hennemuth, A.; Prakosa, A.; Liebgott, H.; Somphone, O.; Allain, P.; Makram Ebeid, S.; Delingette, H.; Sermesant, M.; D’hooge, J.; Saloux, E., “3D Strain Assessment in Ultrasound (Straus): A Synthetic Comparison of Five Tracking Methodologies,” Medical Imaging, IEEE Transactions on , vol.32, no.9, pp.1632,1646, Sept. 2013;
 De Craene, M.; Alessandrini, M.; Allain, P.; Marchesseau, S.; Waechter-Stehle, I.; Weese, J.; Saloux, E.; Morales, H.G.; Cuingnet, R.; Delingette, H.; Sermesant, M.; Bernard, O.; D’hooge, J., “Generation of ultra-realistic synthetic echocardiographic sequences,” Biomedical Imaging (ISBI), 2014 IEEE 11th International Symposium on , vol., no., pp.73,76, April 29 2014-May 2 2014
 Alessandrini, M.; De Craene, M.; Bernard, O.; Giffard-Roisin, S.; Allain, P.; Weese, J.; Saloux, E.; Delingette, H.; Sermesant, M.; D’hooge, J., “A Pipeline for the Generation of Realistic 3D Synthetic Echocardiographic Sequences: Methodology and Open-access Database.,” Medical Imaging, IEEE Transactions on, in press.
 M. Alessandrini, B. Heyde, S. Queirós, S. Cygan, M. Zontak, O. Somphone, O. Bernard, M. Sermesant, H. Delingette, D. Barbosa, M. De Craene, M. O’Donnell and J. D’hooge, “Detailed Evaluation of Five 3D Speckle Tracking Algorithms using Synthetic Echocardiographic Recordings”, accepted for publication in IEEE Transactions on Medical Imaging.