A Comparative Study of 2 Different Segmentation Methods of ADC Histogram for Differentiation Genetic Subtypes in Lower-Grade Diffuse Gliomas

Table 2

ADC histogram parameters of the IDH^wt tumors using different ROI methods.

Values (×10^-6 mm^2/s)	The tumor ROI	The tumor ROI excluding cystic and necrotic portions	Test values	values
ADCmean			-2.333^a	0.027
ADCmin			-0.443^a	0.661
P5 ADC			-1.379^a	0.178
P10 ADC			-1.317^a	0.198
P25 ADC			-1.472^a	0.151
P50 ADC			-1.843^a	0.075
P75 ADC			-2.617^a	0.016
P90 ADC			-2.848^a	0.009
P95 ADC			-3.085^a	0.005
ADCmax			-3.755^a	0.001
ADCmode			-0.502^a	0.620
Kurtosis	-0.527 (-1.027, 0.480)		-0.075^b	0.956
Skewness			-1.957^a	0.060
StDev	388.630 (343.670, 689.601)		-2.902^b	0.003
Inhomogenity			-3.047^a	0.006
Range			-3.799^a	0.001
Entropy			-1.527^a	0.137

^a value; ^b value.