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. 2017 Dec 28;32(5):841–847. doi: 10.1007/s10877-017-0094-z

Fig. 5.

Fig. 5

The Savitzky–Golay filtering technique used to remove noise from the signal to facilitate interpretation when rSO2-C and rSO2-A are affected by changes in altitude during flight. a Unprocessed data for rSO2-C, b smoothing with 20 neighbors rSO2-C. c Unprocessed data for rSO2-A, and d smoothing with 20 neighbors rSO2-A. The yellow-colored (shadowed) area symbolizes time in air ambulance