Fig. 4
Box-and-whisker plots of HD of GTV (a) and CTV (b) determined for each modality. Comparisons were made between each two groups with N = 9, N = 8, and N = 7 comparable individuals. HDmean (range) of GTV for each modality, HD of GTVPET was 0 (0–0) for N = 8 and N = 7, HD of GTVCT was 1.24 (0.64–2.10) cm for N = 8 and 1.25 (0.64–2.10) cm for N = 7, HD of GTVMRI was 1.25 (0.57–2.90) cm for N = 7. HDmean (range) of CTV for each modality, HD of CTVPET was 0.97 (0.58–1.40) cm for N = 9 and 0.91 (0.58–1.40) cm for N = 7, HD of CTVCT was 1.24 (1.00–1.57) cm for N = 9 and 1.22 (1.00–1.49) cm for N = 7, DSC of CTVMRI was 1.60 (0.71–3.05) cm for N = 7. HD = Hausdorff distance