Table 2 The ANOVA and t test analysis of automatic delineation of thyroid volume with different thresholds
Group | Tomographic T/B | Automatic delineation of measured thyroid volume with different thresholds (mL) | F | P | |||||
|---|---|---|---|---|---|---|---|---|---|
20% | 25% | 30% | 40% | 50% | |||||
1 |  | 200 | 62.43 ± 1.10 | 54.97 ± 1.25 | 48.77 ± 1.16 | 39.27 ± 1.85 | 31.10 ± 1.99 | 200.94 | 0.000 |
2 |  | 600 | 62.33 ± 1.01 | 55.23 ± 0.87 | 49.90 ± 0.56 | 41.13 ± 0.61 | 33.20 ± 0.30 | 771.85 | 0.000 |
3 |  | 1000 | 61.67 ± 0.21 | 54.73 ± 1.10 | 49.30 ± 1.47 | 40.03 ± 1.95 | 31.87 ± 1.69 | 206.93 | 0.000 |
| Â | F | Â | 0.686 | 0.16 | 0.757 | 1.043 | 1.468 | Â | Â |
| Â | P | Â | 0.539 | 0.856 | 0.509 | 0.409 | 0.303 | Â | Â |