Fig. 3

a AUDVH of lesions showing DC (n = 30) and PD (n = 13), where AUDVH represents tumour-absorbed dose (p = 0.05). b ROC analysis for AUDVH to predict DC. Optimal cut-off noted with asterisk at 131 Gy, with 61.54% sensitivity and 73.33% specificity). The area under the ROC curve of AUDVH for predicting DC was 0.692 (95% CI 0.515–0.869). AUDVH area under dose-volume histogram, DC disease control, PD progressive disease