Figure 6From: Determination of detection depth of optical probe in pedicle screw measurement device IL Phantom measurement results. (a) 6 NIR spectrometers (b) the change of the μ′ s (c) the change of the area (d) the change of the peak (e) the change of the slope. In Figure 6(a), the dark blue and red lines represent the measurement points in tissue 2. The green, purple, blue and orange lines represent the measurement points in tissue 1.Back to article page