3D-2D Deformable Image Registration Using Feature-Based Nonuniform Meshes

Table 3

Evaluation of reconstruction accuracy based on a digital XCAT female phantom.

	Uniform orthogonal grid	Uniform tetrahedron mesh	Nonuniform tetrahedron mesh	Nonuniform tetrahedron mesh	Voxel-based method
Number of vertices	980	981	1,011	10,000	8,650,752
NCC of images	0.9789	0.9792	0.9829	0.9846	0.9775
NRMSE of images	0.1970	0.1954	0.1766	0.1682	0.2035
NCC of DVF	0.7687	0.7680	0.7672	0.7649	0.6292
NRMSE of DVF	1.3875	1.1358	0.9705	0.9777	1.0317

Note. The three mesh-based methods are run through 100 iterations, while the voxel-based method needs 200 iterations.