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Normalized Fourier amplitudes of modulated fluorescence at 0 mm (A) and 6 mm (B) within tissue phantoms with bin time of 0.001s. (C) The inset shows the FFT amplitudes and noise levels at different Cy5 phantom depths within skin tissue mimics. (D) Depth-dependent signal to noise ratio (SNR). The dotted line represents a SNR of 1.
