Table 5.

Comparison of the CTV gEUD among the static, average- and segment-based convolved plans for five individual fractions and a composite plan consisting of all five fractions. The tracking data for the individual fractions are those with the largest SDs from the patient also with the largest SD among all 35 patients. Column 2 shows the differences due to interplay effect alone while column 3 shows the differences due to the combined effect of the intrafraction motion and interplay. Calculations are based on IMRT plans constructed for patient 1.

Fraction	%(∣gEUDseg conv−gEUDave conv∣∕gEUGseg conv) (interplay effect)	%(∣gEUDseg conv−gEUDstatic∣∕gEUDseg conv) (motion and interplay effect)
1	0.3	0.1
2	0.9	1.0
3	0.9	1.6
4	0.8	1.7
5	0.6	0.5
Five-fraction composite	0.4	0.7