Detection of Aβ plaque deposition in MR images based on pixel feature selection and class information in image level

Table 1 The classification results under filter and wrapper mode

Evaluation criteria		GA_SVM (filter)	GA_RF (filter)	PCA_SVM (filter)	PCA_RF (filter)	GA_SVM (wrapper)	GA_RF (wrapper)
Accuracy	Average (%)	73	65	49	64	71	63
Accuracy	Best (%)	77	76	58	71	81	75
Sensitivity	Average (%)	75	70	57	66	64	66
Sensitivity	Best	81	78	69	78	70	78
Specificity	Average (%)	68	58	36	60	75	56
Specificity	Best (%)	70	75	40	60	88	70
Selected feature number	Average	1445	1460	125	125	1450	1460
Selected feature number	Best	1470	1435	125	125	1462	1441

ISSN: 1475-925X