Table 1. Local fuzzy thresholding algorithm performance.

Dice similarity coefficient (DSC), sensitivity (S_n), specificity (S_p) and accuracy (Acc) of automated segmentation of total depolarization image compared to ground truth histopathology demarcation of RFA myocardial samples into healthy, rim, and core regions.

RFA Sample	RFA core				Rim region
	DSC	Sn	Sp	Acc	DSC	Sn	Sp	Acc
1	0.80	0.89	0.96	0.95	0.77	0.95	0.85	0.88
2	0.76	0.73	0.72	0.73	0.82	0.86	0.62	0.62
3	0.76	0.98	0.83	0.86	0.82	0.96	0.64	0.80
4	0.79	0.72	0.84	0.79	0.81	0.78	0.51	0.68
5	0.77	0.83	0.47	0.70	0.80	0.99	0.99	0.57
Mean ± SD	0.78 ± 0.02	0.83 ± 0.10	0.76 ± 0.17	0.81 ± 0.09	0.80 ± 0.02	0.91 ± 0.08	0.72 ± 0.17	0.71 ± 0.10