Fig. 3From: Cochlea sparing optimized radiotherapy for nasopharyngeal carcinomaBoxplots for the PTV dose parameters of the original and optimized plans. Red lines indicate the patients that were originally planned with IMRT (n = 6). Stars indicate significance. NS non-significant, *p ≤ 0.05, **p ≤ 0.01, ***p ≤ 0.001Back to article page