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. 2016 Jan 12;11(1):e0146996. doi: 10.1371/journal.pone.0146996

Fig 8. The target registration error (TRE) and the operation time (OT) for the augmented reality navigation (AR-N) system and conventional navigation (C-N) system.

Fig 8

The performances of the AR-N and C-N systems during the simulated operations were compared. (A) There was no significant difference between the systems in TRE (P > 0.05), (B) but a significant difference was found in OT (P < 0.05).