Texture Analysis in the Assessment of Rectal Cancer: Comparison of T2WI and Diffusion-Weighted Imaging

Table 5

Performance of texture parameters to discriminate high-stage tumors.

Parameters	AUC	value	95% CI	Sensitivity (%)	Specificity (%)	Cutoff value
Discriminate pT3b-4 stage
T2-kurtosis	0.638	0.0028	0.555, 0.716	53.9	75.7	>1.332
T2-energy	0.793	<0.0001	0.718, 0.856	60.5	87.1	≤0.528
T2-entropy	0.743	<0.0001	0.664, 0.811	76.3	64.3	>9.329
A-skewness	0.605	0.0248	0.521, 0.685	30.3	91.4	>0.730
A-kurtosis	0.618	0.0121	0.534, 0.697	50.0	77.1	>0.818
A-entropy	0.602	0.0292	0.518, 0.682	75.0	42.9	>9.395
Discriminate pN1-2 stage
T2-skewness	0.640	0.0029	0.556, 0.718	70.9	54.9	>0.729
T2-energy	0.713	<0.0001	0.632, 0.784	67.3	73.6	≤0.547
T2-entropy	0.602	0.0313	0.518, 0.682	72.7	48.4	>9.288
A-skewness	0.618	0.0243	0.535, 0.698	40.0	90.1	>0.729
A-kurtosis	0.601	0.0489	0.516, 0.681	29.1	93.4	>1.219

Notes: T2-: texture parameters from the T2WI map; A-: texture parameters from the ADC map; CI: confidence interval; AUC: area under the curve.