Table 2.

Mean dose and percentage of volume of heart, lungs and right breast irradiated

Organs at Risk	CT-based cumulative dose plan	Conventional cumulative dose plan	p-values
Heart
Volume ≥ 30 Gy (%)	3.6 (0.0 – 10.9)	1.4 (0.0 – 7.9)	< 0.001
Volume ≥ 20 Gy (%)	5.1 (0.0 – 14.0)	1.9 (0.0 – 9.5)	< 0.001
Volume ≥ 10 Gy (%)	9.0 (0.0 – 22.7)	4.9 (0.0 – 18.0)	< 0.001
Volume ≥ 5 Gy (%)	27.4 (9.5 – 57.4)	20.5 (0.0 – 47.7)	< 0.001
Mean dose (Gy)	5.5 (2.5 – 10.8)	4.0 (1.4 – 9.0)	< 0.001
Lungs
Volume ≥ 30 Gy (%)	4.7 (1.2 – 10.1)	3.5 (0.0 – 9.1)	0.014
Volume ≥ 20 Gy (%)	5.6 (1.7 – 11.1)	4.2 (0.2 – 10.2)	0.006
Volume ≥ 10 Gy (%)	8.2 (2.6 – 14.2)	6.7 (2.5 – 14.1)	0.010
Volume ≥ 5 Gy (%)	16.6 (5.2 – 28.1)	14.7 (7.3 – 26.6)	0.006
Mean dose (Gy)	4.7 (2.0 – 8.4)	4.0 (2.1 – 7.4)	0.011
Right breast
Volume ≥ 30 Gy (%)	0.1 (0.0 – 0.9)	0.0 (0.0 – 0.0)	ns
Volume ≥ 20 Gy (%)	0.2 (0.0 – 2.9)	0.0 (0.0 – 0.0)	ns
Volume ≥ 10 Gy (%)	0.3 (0.0 – 4.7)	0.0 (0.0 – 0.2)	ns
Volume ≥ 5 Gy (%)	0.8 (0.0 – 7.8)	0.2 (0.0 – 1.8)	ns
Mean dose (Gy)	0.9 (0.3 – 2.7)	0.9 (0.5 – 1.7)	ns

Data presented as mean values, with ranges in parentheses