Fig. 3
Box-and-whisker plots of heart and lung doses in patients treated with (n = 111) and without (n = 221) regional LN-RT. LN-RT increases mean doses to the heart and particularly the left lung (upper panel). LN-RT also increases V20Gy for the left lung, with a corresponding trend for the heart (lower panel). Outliers, which are observations that fall at least 1.5 interquartile ranges outside of the box, are overall rare and mainly seen for the heart in some cases with LN-RT. Abbreviations: LN-RT, lymph node radiotherapy. L, left. IQR, interquartile range