Table 3.
Results of texture analysis of energy with filtering
| Reader 1 | Reader 2 | |||||||
|---|---|---|---|---|---|---|---|---|
| AIP | PDAC | p- value | AUC (%) | AIP | PDAC | p- value | AUC (%) | |
| Energy (×102) | 4.61 ± 4.43 | 2.42 ± 3.17 | 0.004 | 68.2 | 5.47 ± 5.23 | 2.08 ± 2.18 | <0.001 | 76.9 |
| Square root-energy (×103) | 9.55 ± 8.16 | 4.45 ± 5.65 | <0.001 | 72.4 | 11.46 ± 8.41 | 4.78 ± 8.51 | <0.001 | 78.6 |
| Logarithm-energy (×103) | 6.45 ± 6.03 | 3.21 ± 4.33 | 0.002 | 69.9 | 7.79 ± 6.86 | 3.35 ± 6.12 | <0.001 | 75.6 |
| Exponential-energy (×103) | 16.03 ± 13.83 | 6.91 ± 5.07 | <0.001 | 74.7 | 18.20 ± 10.98 | 6.81 ± 5.51 | <0.001 | 81.5 |
| Wavelet LLL-energy (×103) | 36.43 ± 35.14 | 19.06 ± 25.09 | 0.004 | 68.3 | 43.30 ± 41.47 | 16.18 ± 17.08 | <0.001 | 74.0 |
| Log sigma 3.5mm-energy (×102) | 8.72 ± 6.85 | 5.71 ± 5.91 | 0.030 | 63.9 | 10.98 ± 7.70 | 6.24 ± 4.13 | 0.003 | 70.3 |
| Log sigma 4.5mm-energy (×102) | 10.58 ± 9.45 | 6.18 ± 6.97 | 0.022 | 64.7 | 13.08 ± 7.70 | 6.25 ± 4.13 | 0.001 | 72.2 |
ADC, apparent diffusion coefficient; AIP, autoimmune pancreatitis; AUC, area under the curve; PDAC, pancreatic ductal adenocarcinoma.
The univariate analysis was performed using the Mann–Whitney U test. For variables with statistically significant results, receiver operating characteristic curves were constructed and the AUCs were calculated. Only the features that showed more than moderate AUC (>70%) for either reader are listed and the full version can be found in the Supplemental.