Table 2.
Patient characteristics and parameters of the patients with and without predicted distant metastasis
| Presence of future distant metastasis | ||||
|---|---|---|---|---|
| metastasis (+) | metastasis (−) | |||
| Patients’ characteristics (no. of patients) | T-stage | T1 or 2 | 0 | 6 |
| T3 or 4 | 8 | 35 | ||
| N-stage | N0 or 1 | 4 | 32 | |
| N2 or 3 | 4 | 9 | ||
| Location | nasal/sinonasal | 3 | 26 | |
| pharynx | 5 | 15 | ||
| Local control/failure | local control | 4 | 32 | |
| local failure | 4 | 8 | ||
| IVIM-DKI parameter (parameter value) | f (% ×102) | 0.11 ± 0.02 | 0.12 ± 0.05 | |
| D* (mm2/s) | 17.7 ± 5.6 | 20.7 ± 8.9 | ||
| D (mm2/s) | 0.82 ± 0.08 | 0.96 ± 0.12 | ||
| K | 0.91 ± 0.08 | 0.82 ± 0.1 | ||
| ADC (parameter value) | ADC (mm2/s) | 0.97 ± 0.09 | 1.07 ± 0.13 | |
The data of intravoxel incoherent motion (IVIM)-diffusion kurtosis imaging (DKI) parameters and the ADC are mean ± standard deviation (SD). D, true diffusion coefficient (×10−3 mm2/s); f, perfusion fraction (×102%); D*, fast diffusion coefficient (×10−3 mm2/s); K, kurtosis value (dimensionless); ADC, apparent diffusion coefficient (×10−3 mm2/s).