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Table 2: ADC values and DCE-MR imaging dynamic parameters of schwannomas and paragangliomas^{^a}
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) <.001^{^b}
    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) .038^{^a}
    K^trans (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) <.001^{^b}
    Wash-in 1.4 (0.74–3.8) 7.26 (2.54–42.6) .002^{^b}
    Washout 3.4 (0.77–8.4) 1.0 (0.42–6.0) .35
    SER 53.9 (47–90) 146 (112–211) <.001^{^b}
    TME (sec) 160 (108–239) 36.2 (27.7–77.4) <.001^{^b}
↵a The numbers in parentheses represent interquartile range.
↵b P < .05.