Table 1. Inter-reader reproducibility for DWI, DKI, IVIM parameters and volume of the whole placenta.
| Parameters | ICC (95% CI) | P value |
|---|---|---|
| Standard DWI parameters | ||
| ADC mean (×10–3 mm2/s) | 0.988 (0.955–0.997) | 0.000 |
| ADC min (×10–3 mm2/s) | 0.842 (0.505–0.958) | 0.001 |
| ADC max (×10–3 mm2/s) | 0.903 (0.664–0.975) | 0.000 |
| eADC mean | 0.991 (0.965–0.998) | 0.000 |
| eADC min | 0.844 (0.504–0.959) | 0.001 |
| eADC max | 0.964 (0.870–0.991) | 0.000 |
| DKI parameters | ||
| MD mean (×10–3 mm2/s) | 0.870 (0.562–0.966) | 0.000 |
| MD min (×10–3 mm2/s) | 0.751 (0.249–0.932) | 0.005 |
| MD max (×10–3 mm2/s) | 0.767 (0.341–0.935) | 0.002 |
| MK mean | 0.991 (0.965–0.998) | 0.000 |
| MK min | N/A | N/A |
| MK max | 0.790 (0.383–0.958) | 0.002 |
| IVIM parameters | ||
| f mean (%) | 0.896 (0.647–0.973) | 0.000 |
| f min (%) | N/A | N/A |
| f max (%) | N/A | N/A |
| D mean (×10–3 mm2/s) | 0.980 (0.924–0.995)) | 0.000 |
| D min (×10–3 mm2/s) | 0.892 (0.639–0.972) | 0.000 |
| D max (×10–3 mm2/s) | 0.950 (0.822–0.987) | 0.000 |
| D* mean (×10–3 mm2/s) | 0.832 (0.454–0.956) | 0.000 |
| D* min (×10–3 mm2/s) | 0.990 (0.962–0.998) | 0.000 |
| D* max (×10–3 mm2/s) | N/A | N/A |
| Volume (mL) | 0.953 (0.831–0.956) | 0.000 |
DWI, diffusion-weighted imaging; DKI, diffusion kurtosis imaging; IVIM, intravoxel incoherent motion MR imaging; ICC, intraclass correlation coefficient; CI, confidence interval; ADC, apparent diffusion coefficient; eADC, exponential ADC; MD, diffusion coefficient; MK, diffusion kurtosis; f, perfusion fraction; D, pure diffusion coefficient; D*, pseudo-diffusion coefficient.