Table 1.

Mean-absolute-error (MAE) of motion estimation by DL

part of head		bottom		middle			top
z-coverage		4cm	1cm	4cm	1cm	4cm	1cm
intra-slice	tx(mm)	0.38±0.20	0.54±0.50*	0.41±0.15	0.54±0.32*	0.42±0.20	0.59±0.52*
	ty(mm)	0.32±0.14	0.57±0.57*	0.33±0.15	0.50±0.29*	0.43±0.21	0.55±0.31*
	rz(°)	0.33±0.14	0.41±0.35*	0.34±0.16	0.38±0.31*	0.51±0.24	0.69±0.36*
inter-slice	tz(mm)	0.33±0.14	0.43±0.32*	0.34±0.16	0.51±0.38*	0.40±0.22	0.51±0.30*
	rx(°)	0.28±0.13	0.53±0.44*	0.29±0.14	0.64±0.50*	0.31±0.14	0.68±0.52*
	ry(°)	0.30±0.13	0.47±0.39*	0.34±0.16	0.47±0.35*	0.41±0.20	0.49±0.38*

z-coverage = 4cm corresponds to the main simulation study where we input 15 PAR images with z-resolution = 2.5mm. z-coverage = 1cm corresponds to the shorter z-coverage study where we input 15 PAR images with z-resolution = 0.625mm.

^*means statistically significant larger (p<0.05 by a one-tailed paired t-test).