Dosimetric comparison of two dose expansion methods in intensity modulated radiotherapy for breast cancer

Radiation Oncology

Table 2 Comparison of dosimetry of OARs between two plans \(\left( {\overline{x} \pm s} \right)/M\left( {Q1, Q2} \right)\)

Parameters	IMRT-SF	IMRT-VB	t/z-stat	P-value
Left lung V₅/%	44.60 (43.53, 49.13)	44.75 (42.98, 48.93)	− 0.255	0.799
Left lung V₁₀/%	30.72 ± 3.21	31.39 ± 2.99	− 2.831	0.02
Left lung V₂₀/%	19.10 ± 1.91	19.64 ± 1.78	− 5.576	< 0.001
Left lung V₃₀/%	12.86 ± 1.52	13.70 ± 1.56	− 7.517	< 0.001
Left lung D_mean/cGy	1047.78 ± 83.38	1097.28 ± 77.94	− 8.016	< 0.001
Right lung D_mean/cGy	109.94 ± 38.15	108.20 ± 35.71	1.341	0.213
Heart V₅/%	34.14 ± 4.81	33.52 ± 4.64	0.804	0.442
Heart D_mean	631.25 ± 80.07	635.76 ± 86.82	− 0.558	0.591
Cord D_max/cGy	48.17 ± 6.08	48.78 ± 6.01	− 3.966	0.003
Right lung V₅/%	2.30 (1.25, 3.43)	2.40 (0.93, 3.38)	− 0.475	0.635
Right lung V₁₀/%	0 (0.00, 0.00)	0 (0, 0.10)	0.000	1.000

ISSN: 1748-717X