Table 3.

CTV-to-PTV expansion

Variable	Interfraction (mm)			Residual error (mm)
	RL	SI	AP	RL	SI	AP
Systematic shift (∑)	1.2	0.8	1.7	0.3	0.3	0.2
Average random shift (σ)	1.0	1.1	1.2	0.7	0.7	1.0
PTV margin	3.7	2.8	5.1	1.2	1.2	1.2