Patients were
grouped into two cohorts: WBRT (n = 11) and B/CWRT + RNI (n = 9). 3D-conformal plans were developed and FB was
compared to DIBH for each cohort using Wilcoxon signed-rank tests for continuous variables and McNemar’s test for
discrete variables. The percent relative reduction conferred by DIBH in mean heart and LAD dose, as well as lung V20
were compared between the two cohorts using Wilcox rank-sum testing. The significance level was set at 0.05 with
Bonferroni correction for multiple testing.