Table 1.

Quantitative nerve segmentation results.

Nerve Segmentation DSC	Bright lighting 0.421 (± 0.054, n = 155)	Medium lighting 0.573 (± 0.079, n = 70)	Dim lighting 0.395 (± 0.097, n = 52)
Far-away 0.360 (± 0.058, n = 138)	0.343 (± 0.077, n = 78)	0.395 (± 0.136, n = 30)	0.369 (± 0.129, n = 30)
Close-up 0.548 (± 0.054, n = 139)	0.500 (± 0.074, n = 77)	0.707 (± 0.075, n = 40)	0.430 (± 0.159, n = 22)

Quantitative results of micro-averaged segmentation dice similarity coefficient (DSC) across all 5 cross-validation test folds. Evaluation examines all combinations of image conditions (picture distance and brightness) with 95% confidence intervals. Confidence intervals are calculated using the standard error of the n averaged dice scores. Best-performing condition is bolded. The algorithm had the best performance on images that were close-up to the surgical anatomy and had medium lighting.