Table 5.

Patient-specific random inter-fraction error of gross tumor volume bounding box relative to the first ABC helical CT scan (n = 9), oriented along the axis of maximum variance. ‘Minimum box corner’ is the 3D position of the right, posterior, superior box corner surrounding the GTV; ‘Maximum box corner’ is the 3D position of the left, anterior, inferior box corner surrounding the GTV; ‘Centroid’ is the 3D position of the GTV centroid. All data reported in mm.

Patient	Minimum Box Corner	Centroid	Maximum Box Corner	RMS
1	2.8	3.5	2.5	3.6
2	4.4	2.5	3.2	4.3
3	7.9	4.9	2.3	6.8
4	7.6	8.8	17.4	14.8
5	1.1	1.0	0.9	1.2
6	3.8	5.6	14.7	11.4
7	14.7	9.2	5.2	12.8
8	2.3	2.2	1.8	2.6
9	2.3	2.0	2.5	2.8

Abbreviations: RMS = root mean square of minimum, centroid, and maximum positions.