Byers, R.A. orcid.org/0000-0001-8582-9325 and Matcher, S.J. (2019) Ghosting artifact reduction of polarization sensitive optical coherence tomography images through wavelet-FFT filtering. In: Fujimoto, J.G. and Izatt, J.A., (eds.) Proceedings of SPIE. Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXIII, 02-07 Feb 2019, San Francisco, CA, USA. SPIE - Society of Photo-optical Instrumentation Engineers ISBN 9781510623767
Abstract
Undesirable cross-coupling between polarisation-maintaining (PM) fibers can result in detrimental ghost artefacts within polarisation sensitive optical coherence tomography (PS-OCT) images. Such artefacts combine with coherence noise stripes (originating from Fresnel reflections of optical components), complex-conjugate derived mirror-images and further irregular autocorrelation terms originating from the sample. Together, these artefacts can severely degrade the detected images, making quantitative measurements of the tissue birefringence challenging to perform. In this work, we utilize the recently presented wavelet-FFT filter1 to efficiently suppress these imaging artefacts entirely through post-processing. While the original algorithm was designed to suppress one-dimensional stripe artefacts, we extend this methodology to also facilitate removal of artefacts following a duplicate or inverse (mirror) profile to that of the skin surface. This process does not require any hardware modification of the system and can be applied retroactively to previously acquired OCT images. The performance of this methodology is evaluated by processing artefact-corrupted PS-OCT images of skin consisting of simultaneously detected horizontal and vertical polarized light. The resulting images are used to calculate a phase retardance map within the skin, the profile of which is indicative of localized birefringence. Artefacts in the resulting processed PSOCT images were notably attenuated compared to the unprocessed raw-data, with minimal degradation to the underlying phase retardation information. This should improve the reliability of curve-fitting for measurements of depth-resolved birefringence.
Metadata
Item Type: | Proceedings Paper |
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Authors/Creators: |
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Editors: |
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Copyright, Publisher and Additional Information: | Copyright © 2019 Society of Photo Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this publication for a fee or for commercial purposes, or modification of the contents of the publication are prohibited. |
Keywords: | Polarization Sensitive; Optical Coherence Tomography; Image Artefacts; Ghost Artefacts; Wavelet-FFT filtering; Image Processing |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Engineering (Sheffield) > Department of Electronic and Electrical Engineering (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 08 Sep 2021 10:57 |
Last Modified: | 08 Sep 2021 10:57 |
Status: | Published |
Publisher: | SPIE - Society of Photo-optical Instrumentation Engineers |
Refereed: | Yes |
Identification Number: | 10.1117/12.2511519 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:177897 |