Abstract
Three-dimensional (3D) left ventricular (LV) reconstruction from sparse cardiac magnetic resonance (CMR) imaging remains challenging due to inter-slice misalignment and insufficient local spatial information between slices. Global aggregation of contour features may obscure local contour-to-surface relationships. We propose Local2Mesh, a spatially localized contour-to-mesh framework that deforms a template mesh to reconstruct 3D LV geometry from sparse 2D contours without 3D mesh annotations. The framework introduces geometry-aware alignment to correct inter-slice misalignment and a plane-aware Local Router that routes contour features to template vertices using vertex-to-plane distances. Local and global contour features then jointly guide graph-based template deformation for 3D LV reconstruction. Experiments on two public datasets, M\&Ms-2 and ACDC, demonstrate superior geometric reconstruction and functional estimation over existing methods. Zero-shot transfer from M\&Ms-2 to ACDC demonstrates strong cross-dataset generalization. Reconstructed meshes also improve disease classification over sparse contours, supporting their utility for downstream cardiac analysis. These results demonstrate that combining geometry-aware alignment with local contour-to-vertex modeling improves LV reconstruction from sparse 2D contours and supports downstream cardiac analysis. The code is available at https://github.com/hwu918945-alt/loca2mesh.
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Cite this article
APA 7
Wu, H., Lin, L., Lefèvre, P., Li, R., & Sun, X. (2026). Local2Mesh: Spatially Localized Contour-to-Mesh for Left Ventricular Reconstruction from Sparse 2D Cardiac MRI. https://omanscience.com/en/articles/local2mesh-spatially-localized-contour-to-mesh-for-left-ventricular-reconstruction-from-sparse-2d-cardiac-mri
MLA 9
Wu, Haoyu, et al. "Local2Mesh: Spatially Localized Contour-to-Mesh for Left Ventricular Reconstruction from Sparse 2D Cardiac MRI." https://omanscience.com/en/articles/local2mesh-spatially-localized-contour-to-mesh-for-left-ventricular-reconstruction-from-sparse-2d-cardiac-mri.
Chicago (author–date)
Wu, Haoyu, Ling Lin, Pascal Lefèvre, Ruizhe Li, and Xiaowu Sun. 2026. "Local2Mesh: Spatially Localized Contour-to-Mesh for Left Ventricular Reconstruction from Sparse 2D Cardiac MRI." https://omanscience.com/en/articles/local2mesh-spatially-localized-contour-to-mesh-for-left-ventricular-reconstruction-from-sparse-2d-cardiac-mri.
Harvard
Wu, H., Lin, L., Lefèvre, P., Li, R. and Sun, X. (2026) 'Local2Mesh: Spatially Localized Contour-to-Mesh for Left Ventricular Reconstruction from Sparse 2D Cardiac MRI', Available at: https://omanscience.com/en/articles/local2mesh-spatially-localized-contour-to-mesh-for-left-ventricular-reconstruction-from-sparse-2d-cardiac-mri.
Vancouver
Wu H, Lin L, Lefèvre P, Li R, Sun X. Local2Mesh: Spatially Localized Contour-to-Mesh for Left Ventricular Reconstruction from Sparse 2D Cardiac MRI. https://omanscience.com/en/articles/local2mesh-spatially-localized-contour-to-mesh-for-left-ventricular-reconstruction-from-sparse-2d-cardiac-mri
IEEE
H. Wu, L. Lin, P. Lefèvre, R. Li, and X. Sun, "Local2Mesh: Spatially Localized Contour-to-Mesh for Left Ventricular Reconstruction from Sparse 2D Cardiac MRI," https://omanscience.com/en/articles/local2mesh-spatially-localized-contour-to-mesh-for-left-ventricular-reconstruction-from-sparse-2d-cardiac-mri.