Table 1.

Mean deviation of MVision positioning accuracy at six known positions for the different CBCT imaging MUs, reconstruction slice thicknesses, and planning CT slice thicknesses for the phantom study.

			Deviation (mm)
CBCT Imaging MUs a	CBCT Slice Thickness b (mm)	Planning CT Slice Thickness c (mm)	SI	LR	AP
5	1	1	$0.6\pm 0.5$	$0.4\pm 0.3$	$0.5\pm 0.0$
		3	$1.0\pm 0.0$	$0.8\pm 0.5$	$0.4\pm 0.5$
8	1	1	$0.6\pm 0.5$	$0.5\pm 0.4$	$0.5\pm 0.0$
		3	$1.3\pm 0.5$	$1.0\pm 0.7$	$0.3\pm 0.5$
5	3	1	$0.5\pm 0.4$	$0.5\pm 0.4$	$0.5\pm 0.0$
		3	$1.3\pm 1.0$	$0.6\pm 0.5$	$0.4\pm 0.5$
8	3	1	$0.5\pm 0.6$	$0.5\pm 0.4$	$0.5\pm 0.0$
		3	$1.0\pm 0.8$	$0.5\pm 0.4$	$0.3\pm 0.5$

^aCompared with CBCT imaging MUs: ${\mathrm{F}}_{\text{SI}}=0.0$, $p=1.0$; ${\mathrm{F}}_{\text{LR}}=0.037$, $p=0.849$; ${\mathrm{F}}_{\text{AP}}=0.261$, $p=0.614$.

^bCompared with CBCT slice thickness: ${\mathrm{F}}_{\text{SI}}=0.090$, $p=0.767$; ${\mathrm{F}}_{\text{LR}}=0.926$, $p=0.346$; ${\mathrm{F}}_{\text{AP}}=0.0$, $p=1.0$

^cCompared with planning CT slice thickness: ${\mathrm{F}}_{\text{SI}}=7.254$, $p=0.013$; ${\mathrm{F}}_{\text{LR}}=0.037$, $p=0.849$; ${\mathrm{F}}_{\text{AP}}=2.348$, $p=0.139$