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Table 2 Correlation between PET MTVs and MRI GTV

From: Comparison of novel multi-level Otsu (MO-PET) and conventional PET segmentation methods for measuring FDG metabolic tumor volume in patients with soft tissue sarcoma

MTV parameter Ratio of MTV to GTV Spearman correlation coefficient Intra-class correlation coefficient
(95% CI)
MO-PET 1.12 ± 0.42 0.945*** 0.93 (0.88–0.96)
PET Edge™ 1.08 ± 0.38 0.947*** 0.84 (0.71–0.91)
SUV 2.0 1.00 ± 0.61 0.799*** 0.79 (0.62–0.88)
SUV 2.5 0.80 ± 0.55 0.680*** 0.73 (0.52–0.85)
SUV 3.0 0.65 ± 0.50 0.561*** 0.68 (0.44–0.82)
30% SUVmax 0.64 ± 0.35 0.738*** 0.42 (− 0.04–0.67)
40% SUVmax 0.39 ± 0.28 0.621*** 0.21 (− 0.40–0.56)
50% SUVmax 0.23 ± 0.20 0.426** 0.10 (− 0.60–0.50)
60% SUVmax 0.12 ± 0.13 0.291* 0.04 (− 0.71–0.46)
  1. *Significant at p = 0.045; **significant at p = 0.003; ***significant at p < 0.001