The author presents a system and algorithm to achieve full range complex Fourier domain optical coherence tomography (OCT) capable of imaging biological tissues in vivo. The method utilizes the Hilbert transformation to obtain the analytic functions for spatial interference signals obtained from each single wavelength covered in the broadband OCT light source before performing the Fourier transformation to localize the scatters within a sample. A constant carrier frequency is introduced in the spatial OCT interference signal so that its Hilbert transformation is strictly equal to its quadrature representation. The method is experimentally validated for in vivo imaging.
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Ruikang K. Wang (2007) studied this question.
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