Table 1.

NSABP B‐39/RTOG 0413 Dose Constraints for Left‐Sided External Beam PBI.

	Objective
PTVEVAL	$>90\%$ should receive 3465 cGy
Max Dose	$<4620\text{cGy}$
Ipsilateral Breast	$<60\%$ should receive $\ge 1925\text{cGy}$
Ipsilateral Breast	$<35\%$ should receive $>3850\text{cGy}$
Contralateral Breast	Max point dose $<115.5$ cGy
Ipsilateral Lung	$<15\%$ can receive 1155 cGy
Contralateral Lung	$<15\%$ can receive 192.5 cGy
Heart (Left)	$<40\%$ can receive 192.5 cGy
Thyroid	Max point dose $<115.5\text{cGy}$