Table 1.

Temporal and angular accuracy of the proposed synchronization method tested on the moving phantom. The temporal difference between the sinusoidal peaks of the motion signals extracted from CBCT projections and optical surfaces are expressed as median value ± interquartile range (IQR)

Test	Frequency of Phantom Motion (Hz)	Temporal Accuracy (msec)	Angular Accuracy (°)
T1	0.75	$4.4\pm 14.4$	0.05
T2	0.85	$12.9\pm 2.9$	0.07
T3	1.0	$1.1\pm 3.6$	0.08
T4	1.0	$1.2\pm 0.2$	0.07
T5	1.0	$0.8\pm 2.0$	0.09
T6	1.0	$2.8\pm 5.1$	0.09
T7	1.0	$-3.1\pm 5.5$	0.04
T8	1.0	$7.8\pm 7.3$	0.08
$\text{Median}\pm \text{IQR}$		$2.0\pm 5.2$	$0.08\pm 0.03$