Table 3.

3D and 2D tumor centroid errors (mm) of EE phase, $e_{EE}^{3D}$ and $e_{EE}^{2D}$; 3D and 2D tumor centroid errors (mm) of EI phase, $e_{EI}^{3D}$ and $e_{EI}^{2D}$; computation time for 5 patient datasets. Numbers inside the parentheses are, respectively, the tumor centroid error (mm) before CLARET registration (using Fréchet mean image), and percentage error reduction after registration. The 2D error refers to the tumor centroid error in the directions orthogonal to the projection direction (coronal plane).

Patient #	$e_{EE}^{3D}(\text{mm})$	$e_{EE}^{2D}(\text{mm})$	$e_{EI}^{3D}(\text{mm})$	$e_{EI}^{2D}(\text{mm})$	Time (s)
1	2.27 (7.96,72%)	2.07 (4.16,50%)	5.26 (8.03,34%)	4.71 (6.80,31%)	1.94±0.74
2	3.20 (9.70,67%)	2.23 (9.18,76%)	2.85 (7.45,62%)	1.64 (6.77,75%)	3.99±1.99
3	1.32 (1.47,10%)	1.32 (1.47,10%)	2.03 (3.63,44%)	1.86 (3.49,47%)	2.45±0.15
4	2.77 (10.17,73%)	1.51 (9.67,84%)	2.31 (5.53,58%)	1.52 (5.17,71%)	1.96±0.02
5	2.24 (3.52,36%)	1.91 (3.46,45%)	2.40 (3.89,38%)	0.83 (3.16,74%)	2.76±1.26