Table 2.

Motion ranges, RMS errors, 3D normalized RMS errors and percentages of time for 3D errors exceeding 0.5, 1, 2 mm in simulation cases of real prostate motions in IMRT without noise in the 2D marker positions.

Motion ranges (mm)			RMS errors (mm)				3D normalized RMS errors	% of time for 3D errors exceeding (mm)
x	y	z	x	y	z	3D		0.5	1	2
2.5	5.2	5.9	0.195	0.292	0.067	0.357	0.097	11.3	2.5	0.0
1.5	1.9	2.7	0.237	0.319	0.035	0.399	0.231	19.4	1.3	0.0
1.6	3.3	2.6	0.139	0.213	0.026	0.256	0.109	5.0	1.3	0.0
1.2	1.9	1.8	0.160	0.236	0.033	0.287	0.183	8.75	0.0	0.0
1.8	4.9	5.0	0.317	0.399	0.080	0.516	0.195	32.5	3.8	0.0
2.0	10.3	11.6	0.642	0.813	0.089	1.040	0.331	36.3	23.1	7.5
1.7	3.3	3.2	0.180	0.212	0.035	0.280	0.124	5.6	0.6	0.0
Average			0.267	0.355	0.052	0.448	0.181	17.0	4.7	1.1