Accuracy of robotic patient positioners used in ion beam therapy

Radiation Oncology

Table 1 Summary of the measurement results

		Room H1	Room H2
Number of setups		512	506
3d error	median	0.38 mm	0.28 mm
3d error	0.95 quantile	0.72 mm	0.53 mm
	maximum	1.02 mm	0.75 mm
2d error	median	0.25 mm	0.20 mm
2d error	0.95 quantile	0.50 mm	0.43 mm
	maximum	0.66 mm	0.62 mm
rotational error	isocentric mean	−0.007°	−0.006°
	isocentric standard deviation	0.026°	0.019°
	pitch mean	−0.010°	−0.022°
	pitch standard deviation	0.020°	0.014°
	roll mean	−0.015°	−0.012°
	roll standard deviation	0.025°	0.026°

ISSN: 1748-717X