Table 2. Results of visual analysis.

Subject	Reference for lesion	Sensitivity	Specificity	PPV	NPV	Accuracy	AUC
All lesion	Around	91.5	53.8	78.2	77.8	78.1	0.73
	Contralateral	89.4	50.0	76.4	72.2	75.3	0.70
	Frontal lobe	85.1	57.7	78.4	68.2	75.3	0.71
	Cerebellum	78.7	73.1	84.1	65.5	76.7	0.76
Glioma	Around	85.7	50.0	78.3	62.5	74.2	0.68
	Contralateral	81.0	50.0	77.3	55.6	71.0	0.65
	Frontal lobe	71.4	60.0	78.9	50.0	67.7	0.66
	Cerebellum	66.7	60.0	77.8	46.2	64.5	0.63
Brain metastasis	Around	96.2	56.3	78.2	90.0	81.0	0.76
	Contralateral	96.2	50.0	75.8	88.9	78.6	0.73
	Frontal lobe	96.2	56.3	78.2	90.0	81.0	0.76
	Cerebellum	88.5	81.3	88.5	81.3	85.7	0.85

PPV: positive predictive value, NPV: negative predictive value, AUC: area under the receiver-operating characteristic curve.