Table 1

Treatment site	# of Patients	IEC-X(mm)			IEC-Y(mm)			IEC-Z(mm)
Treatment site	# of Patients	mean±SD	min	max	mean±SD	min	max	mean±SD	min	max
Prostate	30	-2.9±3.1	-0.1	-10.8	-2.3±3.1	0	-6.9	10.98±4.48	-0.1	16.9
H & N	26	-3.5±2.8	-0.1	-7.9	-1.1±2.3	-0.3	3.9	6.09±2.23	2.6	11.2
Lung	18	-1.7±4.3	0.1	-11	-2.8±7.3	0.1	-20.6	4.72±8.11	-0.2	16.4
Pelvis	17	-2.7±3.6	0	-12.2	-1.1±5.3	0	15.3	9.06±4.88	0	17.4
Brain	9	-1.7±1.2	0.3	-3.8	-3.9±3.7	-0.6	-11.7	4.81±2.16	0.9	6.7

Table 1: Mean systematic shifts with standard deviation (SD) for different treatment sites. Positive and negative signs denote the coordinate directions of Tomotherapy system.