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EJNMMI Physics

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
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