Table 1.

Summary of biological effective dose to organs at risk

Priority	Organ	α/β	BED metric	BED1	BED1_onCT2	BED2	BED sum	Cumulative dose limits
								BED (Gyα/β)	Physical (Gy/4 fx)
1	Spinal canal	2	D max (Gy2)	47.2	46.9	12.1	47.1	D max < 110.5	D max < 26
2	PBTa	3	D max (Gy3)	21.8	21.5	32.2	34.7	D max < 135.7	D max < 34.8
3	Esophagus	3	D max (Gy3)	100.5	104.3	12.7	104.4	D max < 105	D max < 30
4	Lungs‐PTVb	3	V 53.3Gy3 (%)	3.5	1.8	1.3	3.3	V 53.3 < 10%	V20 < 10%
5	Heart	3	D max (Gy3)	104.6	107.8	40.5	107.9	D max < 130.3	D max < 34
6	Skin	3	D max (Gy3)	47.3	48.5	99.5	105.0	D max < 144	D max < 36

BED₁ doses are reported using CT₁ contours.

BED_{1_onCT2} doses are reported using CT₂ contours after warping BED₁ onto CT₂.

BED₂ and BED sum doses are reported using CT₂ contours.

^aPBT, proximal bronchial tree.

^bLungs‐PTV contours are different in CT₁ and CT₂ due to different PTVs.