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. Author manuscript; available in PMC: 2023 May 16.

Published in final edited form as: Radiother Oncol. 2021 Feb 13;159:33–38. doi: 10.1016/j.radonc.2021.02.008

Table 2.

Dose-volume constraints for target and normal tissues for 40 Gy SBRT

Structure	Parameter	Dose-volume constraint
Prescription dose (Gy)	PTV D95%	≥90% of prescription dose
Rectum	Max point dose	103% of prescription dose
	D1cc	38.5 Gy
	Mean	16.4 Gy
	V24Gy	<25%
	V30.15Gy	≤8 cc
Bladder	Max point dose	105% of prescription dose
	D50	20 Gy
Femoral heads	Max point dose	31 Gy
Large bowel	Max point dose	29 Gy
Small bowel	Max point dose	25 Gy
Bladder trigone	Max point dose	41.2 Gy
Urethra	Max point dose	105% of prescription dose
	D1cc	40 Gy