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. 2023 Jan 16;37(5):3691–3700. doi: 10.1007/s00464-023-09874-2

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Fig. 1 — The Region of Interest (ROI) is imaged, and a reconstructed color image is provided (a). Spectroscopy (b) is performed for every single pixel, creating the so-called hypercube (c). The raw spectral data are used for computing the parameters (d) for Oxygenation (StO₂), Near InfraRed-Perfusion Index (NIR-PI), Tissue Water Index (TWI), and Organ Hemoglobin Index (OHI)