A conditional point cloud diffusion model for deformable liver motion tracking via a single arbitrarily-angled x-ray projection.

The mean liver tumor motion magnitudes (in vector length) across the three subsets are 10.89 ± 4.95 mm (train), 9.57 ± 4.56 mm (validation), and 15.70 ± 6.96 mm (test), and the mean liver boundary motion magnitudes are 7.77 ± 2.52 mm (train), 6.20 ± 2.44 mm (validation), and 11.18 ± 3.56 mm (test), confirming an increasing trend in motion complexity from training to testing (table 1 ).

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