From: Diagnostic accuracy of apparent diffusion coefficient ratio in distinguishing common pediatric CNS posterior fossa tumors
ADC ratio
Cutoff
Sensitivity (%)
Specificity (%)
AUC
95% CI
P value
Astrocytoma
> 1.7
87.5
93.3
0.85
0.61 to 0.97
0.002*
Ependymoma
≤ 1.6
87.8
99.5
Medulloblastoma
≤ 1.2
100
90.0
0.99
0.83 to 1.0
< 0.001*