Comparison of Imaging Parameters Between Different World Health Organization Grade GEP NETs
| Parameter | Grade 1 (n = 12) | Grade 2 (n = 12) |
| Diameter (mm) | 19.7 ± 9.6 (12.0–95.0) | 40.7 ± 30.4 (11.0–40.0) |
| TFTV (cm3) | 6.4 ± 9.9 (1.2–34.2) | 70.6 ± 112.2 (1.5–351.1) |
| Ki-67 proliferation index (%) | 1.6 ± 0.6 (0.9–2.0) | 5.3 ± 2.6 (2.3–10) |
| TBR | 6.6 ± 1.9 (3.1–10.1) | 12.7 ± 9.3 (3.9–33.2) |
| SUVmean | 14.7 ± 7.0 (4.0–23.2) | 23.1 ± 12.3 (8.0–45.0) |
| SUVmax | 34.9 ± 16.9 (14.5–62.5) | 42.3 ± 26.6 (14.8–89.5) |
| ADCmean (×10−3 mm2/s) | 1.24 ± 0.18 (1.05–1.49) | 0.96 ± 0.26 (0.50–1.22) |
| ADCmin (×10−3 mm2/s) | 0.67 ± 0.14 (0.51–0.87) | 0.49 ± 0.24 (0.23–0.85) |
| Enhancement ratio | 1.2 ± 0.8 (0.6–2.9) | 1.0 ± 0.4 (0.4 to 1.6) |
Data are mean ± SD followed by range in parentheses.