ADC values and DCE-MR imaging dynamic parameters of schwannomas and paragangliomasa
| Schwannomas (n = 15) | Paragangliomas (n = 27) | P Value | |
|---|---|---|---|
| Mean ADC (× 10–3 mm2/s) | 1.17 (SD, 0.31) | 1.12 (SD, 0.26) | .56 |
| Normalized mean ADC | 1.54 (SD, 0.43) | 1.45 (SD, 0.37) | .53 |
| Quantitative values | |||
| Vp | 0.06 (0.03–0.12) | 0.40 (0.34–0.54) | <.001b |
| Ve | 0.42 (0.25–0.77) | 0.28 (0.16–0.47) | .38 |
| Kep (min–1) | 0.58 (0.36–0.67) | 1.02 (0.43–2.27) | .038a |
| Ktrans (min-–1) | 0.15 (0.11–0.26) | 0.31 (0.13–0.74) | .16 |
| Semiquantitative values | |||
| AUC (mmol.min/L) | 5.6 × 104 (1.95 × 104–1.55 × 105) | 7.0 × 104 (3.8 × 104–4.1 × 105) | .08 |
| Peak enhancement | 137 (75–220) | 294 (266–300) | <.001b |
| Wash-in | 1.4 (0.74–3.8) | 7.26 (2.54–42.6) | .002b |
| Washout | 3.4 (0.77–8.4) | 1.0 (0.42–6.0) | .35 |
| SER | 53.9 (47–90) | 146 (112–211) | <.001b |
| TME (sec) | 160 (108–239) | 36.2 (27.7–77.4) | <.001b |