Table 1.

Dose constraints for MRgSBRT re-irradiation

Name	Constraint	Target	Priority
Gross tumor volume	V95%[%]	> = 80	2
Optimal planning target volume	Dmin[%]	> = 80	2
Protected planning target volume	V95%[%]	Report
Planning target volume	V100%[%]	Report
Body	V65Gy[cc]	< = 0.03	1
Liver	Dmean[Gy]	< = 0	2
Liver	V8Gy[cc]	< = 700	1
Duodenum	V24Gy[cc]	< = 0.5	1
Stomach	V24Gy[cc]	< = 0.5	1
Small bowel	V24Gy[cc]	< = 0.5	1
Large bowel	V24Gy[cc]	< = 0.5	1
Spinal canal	V12.5Gy[cc]	< = 0.5	1
Right kidney	Dmean[Gy]	< = 7	1
Left kidney	Dmean[Gy]	< = 7	1
Right kidney	D66%[Gy]	< = 10	1
Left kidney	D66%[Gy]	< = 10	1

GTV refers to the target tumor volume. PTV is defined as GTV + 3 mm expansion. PTV_Opt is defined as PTV-GI OAR volumes. PTV_High is defined as PTV-PRV 3 mm of GI OAR volumes