Fig. 1From: Ways to unravel the clinical potential of carbon ions for head and neck cancer reirradiation: dosimetric comparison and local failure pattern analysis as part of the prospective randomized CARE trialDose-volume metrics are specified as ΔCIRT-VMAT in equivalent dose in 2 Gy fractions (EQD2) for the target volumes and all relevant organs at risk. The mean and standard deviation are shown for each dose parameter within the violin plot. Despite the increased target dose (+ 5.6% CTV Dmean; p < 0.001), CIRT resulted in significantly reduced organ at risk dose across all patients (− 8.7% Dmean) compared to VMATBack to article page