Fig. 1.

A) Schematic representing the imaging plane (lime dashed lines), including the optical fiber (blue), PE tubing (red), & direction of light (yellow cone). B) Schematic representing a side view of the imaging setup, with the direction of transducer translation shown with a black arrow. C) Molar absorption coefficient spectra of HHb and HbO₂ (red, blue) from 720 to 860 nm, with dashed lines denoting wavelengths used in this work. D) Blood samples in CO-oximeter cuvettes; blood oxygenation decreases from left to right.