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. Author manuscript; available in PMC: 2021 Jul 27.
Published in final edited form as: IEEE Trans Med Imaging. 2019 Dec 27;39(6):1988–1999. doi: 10.1109/TMI.2019.2962786

Fig. 2.

Fig. 2.

Overview of conventional SFDI illumination patterns, hardware, and processing flow. SFDI captures six frames (three phase offsets at two different spatial frequencies) to generate an absorption and reduced scattering map. DC indicates planar illumination images and AC indicates spatially modulated images. To calculate optical properties, acquired images are demodulated, calibrated against a reference phantom, and inverted using a lookup table.