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Table 2 Comparison of PWI parameters between medulloblastoma and ependymoma

From: The effect of semi-quantitative T1-perfusion parameters for the differentiation between pediatric medulloblastoma and ependymoma

 Medulloblastoma; n = 22Ependymoma; n = 4p value
PWI
 Relative enhancement (%)39.42 (44.79)15.74 (20.02)0.019a
 Maximum enhancement329.66 (704.32)66.83 (50.69)0.006a
 Maximum relative enhancement (%)11.13 (57.51)4.43 (2.23)0.013a
 Time to peak (s)164.87 (32.14)84.57 (105.26)0.016a
 Wash-in rate (s−1)18.10 (21.00)19.20 (19.30)0.776
 Wash-out rate (s−1)2.74 (6.24)7.74 (6.95)0.053
 Area under the curve10,577.78 (102,680.84)1,421.12 (3,316.47)0.023a
PWI ratios
 Relative enhancement ratio13.62 (16.81)6.90 (9.03)0.065
 Maximum enhancement ratio9.00 (16.79)1.65 (2.48)0.016a
 Maximum relative enhancement ratio5.95 (20.71)1.69 (1.77)0.019a
 Time to peak ratio2.65 (2.98)1.71 (2.08)0.177
 Wash-in rate ratio1.71 (4.61)2.36 (7.85)0.722
 Wash-out rate ratio0.57 (1.03)1.01 (0.96)0.151
 Area under the curve ratio39.12 (151.34)3.68 (19.14)0.088
  1. aStatistically significant