Axial resolution improvement by modulated deconvolution in Fourier domain optical coherence tomography

Evgenia Bousi; Constantinos Pitris

doi:10.1117/1.JBO.17.7.071307

16 May 2012 Axial resolution improvement by modulated deconvolution in Fourier domain optical coherence tomography

Evgenia Bousi, Constantinos Pitris

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Journal of Biomedical Optics, Vol. 17, Issue 7, 071307 (May 2012). https://doi.org/10.1117/1.JBO.17.7.071307

Abstract

A novel technique for axial resolution improvement in Fourier domain optical coherence tomography (FDOCT) is presented. The technique is based on the deconvolution of modulated optical coherence tomography signals. In FDOCT, the real part of the Fourier transform of the interferogram is modulated by a frequency which depends on the position of the interferogram in k space. A slight numerical k shift results in a different modulation frequency. By adding two shifted signals, beating can appear in the A-scan. When the amount of shifting is appropriately selected, deconvolution of the resulting depth profile, using suitable modulated kernels, yields a narrower resolution width. A resolution improvement by a factor of ∼ 7 can be achieved without the need for a broader bandwidth light source.

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Evgenia Bousi and Constantinos Pitris "Axial resolution improvement by modulated deconvolution in Fourier domain optical coherence tomography," Journal of Biomedical Optics 17(7), 071307 (16 May 2012). https://doi.org/10.1117/1.JBO.17.7.071307

Published: 16 May 2012

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Cited by 14 scholarly publications and 2 patents.

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KEYWORDS

Deconvolution

Optical coherence tomography

Modulation

Image resolution

Fourier transforms

Signal to noise ratio

Light sources

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