Table 2.

Results of peripheral nerve detection using N _N/N _total.

lowest N N/N total for nerve detection	0	0.1	0.2	0.3	0.4	0.5	0.6	0.7	0.8	0.9	1
TP	158	156	155	152	152	148	143	128	118	93	93
FN	0	2	3	6	6	10	15	30	40	65	65
TN	0	93	111	116	119	119	120	120	120	120	120
FP	120	27	9	4	1	1	0	0	0	0	0
Sensitivity (%)	100	98.7	98.1	96.2	96.2	93.7	90.5	81.0	74.7	58.9	58.9
Specificity (%)	0	77.5	92.5	96.7	99.2	99.2	100	100	100	100	100
Accuracy (%)	56.8	89.6	95.7	96.4	97.5	96.0	94.6	89.2	85.6	76.6	76.6

TP: true positive. FN: false negative. TN: true negative. FP: false positive.

Note: The average and the standard deviation of N _total for the total 278 tissues were 6.0 and 1.9, respectively.