Table 3.

Results of cross-validated classification of chemotherapy response at weeks 1–4 after treatment using the optimal QUS features.

Week	Optimal Feature Set	Sen (%)	Spc (%)	Acc (%)	AUC
1	Slope-Homogeneity∆, ASD-Homogeneity∆, SAS-Energy∆	83 ± 1.0	81 ± 1.1	82 ± 0.7	0.75 ± 0.1
4	Slope-Contrast∆, AAC-Energy∆, SAS-Correlation∆, ASD-Correlation∆	90 ± 0.7	83 ± 1.4	86 ± 0.7	0.80 ± 0.1
8	AAC∆, MBF∆, MBF-Correlation∆, ACE∆	97 ± 0.7	72 ± 1.6	85 ± 0.9	0.89 ± 0.1

Reported are average sensitivity (Sen), specificity (Spc), accuracy (Acc) and area under the curve (AUC) ± one standard error of the mean.