Table 1.

Robustness of target dose coverage <V95> to tracking errors for 4 phantoms. <V95> is the mean V95 for 4 phantoms and 18 motion scenarios. Changes in target coverage (Δ) more than 5% indicated in boldface.

Variable (units)	Magnitude	<V95> (%)	Δ (%)
Perfect Tracking	-	94.8	-
Phase Delay (deg)	5	83.1	−11.7
	10	76.4	−18.4
	15	72.8	−22.0
Random X Offset (mm)	0.5	93.9	−0.9
	1.0	90.7	−4.1
	1.5	86.2	−8.6
Random Y Offset (mm)	0.5	93.9	−0.8
	1.0	90.9	−3.9
	1.5	86.5	−8.2
Random Z Offset (mm)	0.5	95.2	0.5
	1.0	95.6	0.9
	1.5	95.7	0.9
Random XYZ Offset (mm)	0.5	93.3	−1.5
	1.0	87.1	−7.6
	1.5	80.6	−14.2
Systematic X Offset (mm)	1	93.1	−1.6
	2	90.8	−3.9
	3	88.0	−6.8
	4	84.3	−10.4
Systematic Y Offset (mm)	1	94.7	0.0
	2	94.5	−0.2
	3	93.4	−1.4
	4	90.9	−3.9
Systematic Z Offset (mm)	1	94.5	−0.3
	2	94.0	−0.8
	3	93.0	−1.7
	4	91.1	−3.7
Systematic XYZ Offset (mm)	1	92.7	−2.0
	2	88.8	−5.9
	3	82.3	−12.5
	4	74.3	−20.5
Wedge Acceleration (g)	0.001	75.6	−19.2
	0.01	81.3	−13.5
	0.1	86.0	−8.8
	1	93.1	−1.6
	8	94.6	−0.2
	10	94.6	−0.2
	100	94.7	0.0