21 February 2008 Artifact removal in Fourier-domain OCT with a rotating probe
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Proceedings Volume 6851, Endoscopic Microscopy III; 68510G (2008) https://doi.org/10.1117/12.761811
Event: SPIE BiOS, 2008, San Jose, California, United States
This paper reports the study of a Swept Source Optical Coherence Tomography (SS-OCT) setup to remove depth degeneracy for measurements performed with a rotating probe. One of the main drawbacks of SS-OCT is its inability to differentiate positive and negative depths. Some setups have already been proposed to remove this depth ambiguity by introducing a modulation by means of electro-optic or acousto-optic modulators. For cross-sectional imaging, we developed a setup that uses a piezoelectric fiber stretcher to generate a periodic phase shift between successive A-scans, thus introducing a transverse modulation. The depth ambiguity is then resolved by performing a Fourier processing in the transverse direction before processing the data in the axial direction. This approach can also be applied to a rotating probe with a cylindrical geometry by introducing phase shifts between A-scans belonging to successive rotations or between successive B-scans. In the later case, the depth degeneracy is removed by first performing a Fourier processing along the cylindrical axis. We validate this approach by processing images acquired with our catheterized probe based on a rotating fiber and fitted with a GRIN lens and a prism at the tip.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Sébastien Vergnole, Sébastien Vergnole, Guy Lamouche, Guy Lamouche, Marc L. Dufour, Marc L. Dufour, Bruno Gauthier, Bruno Gauthier, Christian Padioleau, Christian Padioleau, "Artifact removal in Fourier-domain OCT with a rotating probe", Proc. SPIE 6851, Endoscopic Microscopy III, 68510G (21 February 2008); doi: 10.1117/12.761811; https://doi.org/10.1117/12.761811


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