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

Table 4

ADC histogram parameters for IDH^mut/1p19q⁻ tumors using different ROI methods.

Values(×10^-6 mm^2/s)	The tumor ROI	The tumor ROI excluding cystic or necrotic portions	Test values	values
ADCmean			-1.445^a	0.156
ADCmin			-0.075^a	0.941
P5 ADC			-0.380^a	0.706
P10 ADC			-0.391^a	0.698
P25 ADC			-0.518^a	0.607
P50 ADC			-0.766^a	0.448
P75 ADC			-1.414^a	0.165
P90 ADC			-2.360^a	0.023
P95 ADC			-2.998^a	0.005
ADCmax			-3.144^a	0.004
ADCmode	1158.50 (1093.50, 1329.88)	1170.50 (1093.50, 1328.25)	-0.094^b	0.925
Kurtosis	1.191 (0.242, 2.290)	0.102(-0.309, 0.328)	-3.157^b	0.002
Skewness		0.378 (0.231, 0.642)	-3.898^b	0.001
StDev			-3.360^a	0.002
Inhomogenity	0.197 (0.165,0.251)		-2.900^b	0.004
Range	1939.25 (1391.00, 2733.13)		-2.547^b	0.011
Entropy			1.450^a	0.155

^a value; ^b value.