Table 2.

Details of V₃₃ for each patient.

	Stomach_PRV* (cm3)		Duodenum_PRV (cm3)		Small intestine_PRV (cm3)		Large intestine_PRV (cm3)
Patient No	PLANsim	Worst-case	PLANsim	Worst-case	PLANsim	Worst-case	PLANsim	Worst-case
1	0	0	0.08	0.59	0.28	0.30	0	0
2	0	0	0.02	0.91	0.14	0.43	0.01	0.75
3	0.14	0.75	0.03	0.10	0.04	1.18	**	**
4	0	0.04	0.20	0.33	0	0.04	0	0
5	0.02	0.02	0.39	0.39	0.04	0.04	0	0
6	0.36	1.25	0	0	0.19	0.19	0	0
7	0	0	0.28	0.48	0.06	0.46	0.06	0.17
8	0.27	0.37	0.20	0.31	0	0.13	0	0
9	0.06	0.06	0	0	0	0	0.34	1.07
10	0	0	0.22	0.22	0.24	1.51	0	0
11	0.02	0.08	0.26	0.94	0	0	0	0

Worst-case is the one with the highest V₃₃ among the three CT data sets (CT_P CT_CE, CT_4D).

*PRV: Generated by adding a 5 mm margin to each GI-tract (stomach, duodenum, small intestine, or large intestine).

**Difficult to identify the large intestine in one case.

PRV: planning at risk volume.