Table 2.

The uniform margins needed to obtain an OI_i of 0.99 for CTV₀ (M_C,0.99) and ITV_n (M_I,0.99), the equivalent uniform margin M₀ for CTV₀ to have the equal volume as ITV_n, and the corresponding equivalent margin differences ΔM.

Group	No. of fractions	MC,0.99 (mm)	MI,0.99 (mm)	M0 (mm)	ΔM (mm)
LRP	2	2.6 ± 0.9	1.7 ± 0.6	0.2 ± 0.5	0.7 ± 0.5
	3	2.6 ± 0.9	1.1 ± 0.5	0.5 ± 0.6	1.0 ± 0.6
	4	2.6 ± 0.9	0.9 ± 0.5	0.7 ± 0.6	1.0 ± 0.6
	5	2.5 ± 0.9	0.6 ± 0.5	0.9 ± 0.6	1.0 ± 0.7
IRP(A)	2	4.1 ± 1.7	2.8 ± 1.3	0.3 ± 0.5	0.9 ± 1.2
	3	4.1 ± 1.7	1.9 ± 1.0	0.7 ± 0.6	1.5 ± 1.0
	4	4.0 ± 1.5	1.5 ± 0.9	0.9 ± 0.7	1.6 ± 1.0
	5	4.0 ± 1.7	1.1 ± 0.6	1.1 ± 0.7	1.7 ± 1.0
IRP(B)	2	4.4 ± 1.7	3.2 ± 1.4	0.3 ± 0.6	1.0 ± 1.3
	3	4.4 ± 1.7	2.1 ± 1.0	0.7 ± 0.6	1.6 ± 1.0
	4	4.4 ± 1.7	1.7 ± 0.9	1.0 ± 0.7	1.8 ± 1.1
	5	4.3 ± 1.7	1.3 ± 0.8	1.2 ± 0.7	1.8 ± 1.1