Diagnostic assessment by dynamic contrast-enhanced and diffusion-weighted magnetic resonance in differentiation of breast lesions under different imaging protocols

Table 2 Diagnostic performances of the features

Feature name	Parameter distribution^*		P-value^#	Specificity	Sensitivity	Accuracy	AUC
Feature name	Benign	Malignant	P-value^#	Specificity	Sensitivity	Accuracy	AUC
*Elongation*	*0.84 ± 0.13*	*0.87 ± 0.11*	*0.39*	*0.11*	*0.89*	*74.19*	*0.58*
*ADC*	*1.04 ± 0.21*	*1.50 ± 0.43*	*0.00*	*0.67*	*0.92*	*87.10*	*0.85*
SER	1.20 ± 0.22	1.00 ± 0.50	0.01	0.33	0.97	84.95	0.71
Correlation	0.65 ± 0.16	0.60 ± 0.17	0.23	0.06	0.96	78.49	0.60
Inertia	1995.34 ± 1177.11	2773.68 1891.29	0.03	0.17	0.93	78.49	0.64
*Entropy*	*8.48 ± 1.30*	*7.90 ± 1.34*	*0.09*	*0.11*	*0.99*	*81.72*	*0.64*
Inverse Difference	0.10 ± 0.05	0.09 ± 0.03	0.22	0.11	0.97	80.65	0.65
*Sum average*	*310.21 ± 37.83*	*285.58 ± 34.20*	*0.01*	*0.11*	*0.99*	*81.72*	*0.70*
*Sum variance*	*9235.63 ± 2999.89*	*10078.03 ± 3168.82*	*0.29*	*0.00*	*1.00*	*80.65*	*0.57*
Sum entropy	6.76 ± 0.87	6.29 ± 0.90	0.04	0.11	0.99	81.72	0.66
Difference average	32.44 ± 10.15	38.73 ± 14.30	0.03	0.28	0.93	80.65	0.66
Difference variance	820.01 ± 486.86	1042.80 636.38	0.10	0.06	0.99	80.65	0.62
Difference entropy	5.40 ± 0.44	5.16 ± 0.47	0.04	0.11	0.99	81.72	0.66
Information Correlation 1	−0.58 ± 0.12	−0.61 ± 0.14	0.43	0.11	0.95	78.49	0.58

Note: 1. ^#Computed with paired-sample t-test.
2.^*The distribution of the variables are denoted in form of Mean ± Standard Deviation.
Statistical analysis of the independent 3.0-Tesla patients group. For each individual variable, its diagnostic performance is tested through ROC analysis on 1.5-Tesla patients group. The five variables (highlighted in italic) when combined together to consist of a highly diagnostic feature subset is shown to outperform over any individual variables in Table 3.

ISSN: 1471-2407