| Autor: |
Guy Lamouche, Christian Padioleau, Sébastien Vergnole, Marc L. Dufour, Bruno Gauthier |
| Rok vydání: |
2008 |
| Předmět: |
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| Zdroj: |
Endoscopic Microscopy III. |
| ISSN: |
0277-786X |
| DOI: |
10.1117/12.761811 |
| Popis: |
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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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