Table 1.

VPD and COMS for XCAT scenarios with CBCT estimation from global PCA motion modeling (GMM) and structural‐based PCA motion modeling (SMM) for single‐view 30° projections and orthogonal‐view 15° projections. The number of projections was 51 and 52 for single‐30° and ortho‐15° acquisitions, respectively

Scenarios			1	2	3	4	5	6	7	8
VPD (%)	Single 30°	GMM	38.29	76.25	53.76	64.04	72.25	65.91	15.73	123.50
		SMM	17.42	31.27	37.23	20.08	37.50	24.40	16.26	70.16
	Ortho 15°	GMM	28.32	78.29	53.28	69.74	79.22	75.21	18.62	115.01
		SMM	14.61	32.73	38.31	12.49	15.70	16.73	15.10	22.48
COMS (mm)	Single 30°	GMM	3.82	3.83	4.00	6.42	7.52	7.02	1.17	13.91
		SMM	1.22	1.12	3.40	1.53	3.78	1.75	0.95	7.77
	Ortho 15°	GMM	2.67	2.69	2.87	7.12	8.31	7.87	1.39	12.70
		SMM	0.44	1.30	1.99	0.43	0.70	0.80	0.68	0.40