Intratumoral quantitative tensor metrics measurements in classic and atypical meningiomas
| Tensor Metric | Classic Meningioma | Atypical Meningioma | P Value | 95% CI |
|---|---|---|---|---|
| FA | 0.230 ± 0.085 | 0.336 ± 0.105 | .012 | −.187–.025 |
| FA ratios | 0.45 ± 0.16 | 0.66 ± 0.19 | .008 | −.354–−.061 |
| ADC | 0.964 ± 0.172 | 0.791 ± 0.129 | .011 | .044–.302 |
| ADC ratios | 1.27 ± 0.24 | 1.05 ± 0.17 | .018 | .041–.393 |
| λ1 | 1.191 ± 0.202 | 1.070 ± 0.159 | .117 | −.033–.275 |
| λ1 ratios | 0.98 ± 0.16 | 0.89 ± 0.15 | .172 | −.043–.224 |
| λ2 | 0.963 ± 0.183 | 0.776 ± 0.183 | .020 | .032–.342 |
| λ2 ratios | 1.39 ± 0.33 | 1.15 ± 0.21 | .045 | .005–.475 |
| λ3 | 0.750 ± 0.173 | 0.541 ± 0.130 | .003 | .080–.339 |
| λ3 ratios | 2.22 ± 0.86 | 1.52 ± 0.61 | .033 | .061–1.325 |
Note:—Data are the mean ± SD. Unit of λ1, λ2, λ3, and ADC values is × 10−3 mm2/s. Tensor metric ratios were calculated by dividing the mean values of each tensor metric in the affected hemisphere by that in the contralateral NAWM. CI indicates confidence interval; FA, fractional anisotropy; ADC, apparent diffusion coefficient.