Fig. 4

Box-and-whisker plots of heart and lung doses for patients treated to the breast or chest wall without regional LN-RT, using either 3DCRT (n = 174) or IMRT/VMAT (n = 47). A significant increase in lung doses can be seen for patients treated with IMRT/VMAT, whereas the difference in heart doses is non-significant. Abbreviations: LN-RT, lymph node radiotherapy. 3DCRT, 3-dimensional conformal radiation therapy. IMRT, intensity modulated radiation therapy. VMAT, volumetric modulated arc therapy. L, left