Table 2.
ROC diagnostic efficiency of IVIM parameters
| Parameter | AUC | p value | Cut-off | Sensitivity (%) | Specificity (%) |
|---|---|---|---|---|---|
| ADCmean (10−3mm2/s) | 0.774 | 0.004 | 1.15 | 74.2 | 71.4 |
| ADCmax (10−3mm2/s) | 0.741 | 0.01 | 1.74 | 74.2 | 71.4 |
| ADCmin (10−3mm2/s) | 0.697 | 0.036 | 0.67 | 67.7 | 64.3 |
| ADCrange (10−3mm2/s) | 0.530 | 0.75 | 1.16 | 48.4 | 64.3 |
| D (10−3mm2/s) | 0.747 | 0.009 | 0.90 | 67.7 | 85.7 |
| D* (10−3mm2/s) | 0.802 | 0.001 | 38.85 | 77.4 | 85.7 |
| f (%) | 0.741 | 0.01 | 42 | 80.6 | 64.3 |
| DDC (10−3mm2/s) | 0.591 | 0.333 | 1.11 | 87.1 | 42.9 |
| α | 0.676 | 0.061 | 0.69 | 74.2 | 64.3 |
ROC analysis was performed for IVIM parameters to obtain the AUC, p value, and cut-off value, as well as the sensitivity and specificity calculated according to the cut-off value. The bold values of p value indicate that the p value of this parameter was less than 0.05
ADC apparent diffusion coefficient map, D true diffusion coefficient, D*, pseudo diffusion coefficient, f perfusion fraction, DDC distributed diffusion coefficient, α diffusion heterogeneity index, ROC receiver operating characteristic, AUC area under the curve