Dr. Agathe Marmin Profile

Dr. Agathe Marmin

at Univ of Washington

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Author

Publications (10)

Proceedings Article | 13 March 2024 Presentation

In-depth reconstruction of anisotropic elasticity in the cornea following collagen crosslinking with time-resolved OCT and AuT-OCE

Ivan (Vanya) Pelivanov, Agathe Marmin, Gabriel Regnault, Ruikang Wang, Matthew O'Donnell, Tueng Shen

Proceedings Volume PC12844, PC1284401 (2024) https://doi.org/10.1117/12.2692412

KEYWORDS: Cornea, Optical coherence tomography, Elasticity, Collagen, Ultraviolet radiation, LASIK, Waveguides, Surgery, Signal attenuation, Laser therapeutics

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Proceedings Article | 13 March 2024 Presentation

Noise correlation elastography using digital holography in mechanically anisotropic media

Nina Dufour, Agathe Marmin, Emmanuel Martins Seromenho, Maud Legrand, Simon Chatelin, Amir Nahas

Proceedings Volume PC12844, PC128440Q (2024) https://doi.org/10.1117/12.3002358

KEYWORDS: Elastography, Digital holography, Tissues, Imaging systems, Biological samples, Ultrasonography, Optical imaging, Optical coherence tomography, Magnetic resonance imaging, Anisotropy

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Proceedings Article | 13 March 2024 Poster

Dynamic imaging using point-scan OCT: preliminary testing

Agathe Marmin, Ruikang Wang

Proceedings Volume PC12841, PC128410M (2024) https://doi.org/10.1117/12.3005881

KEYWORDS: Tissues, Optical coherence tomography, Line scan image sensors, Surgery, Regenerative medicine, Structural imaging, Modeling, Diseases and disorders, Biological research, Biological imaging

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Proceedings Article | 9 March 2023 Presentation

In-vivo multimodal single-shot off-axis FF-OCT (SO-FF-OCT) imaging: optical tomography and shear wave elastography

Emmanuel Martins Seromenho, Agathe Marmin, Sybille Facca, Nadia Bahlouli, Amir Nahas

Proceedings Volume PC12367, PC1236718 (2023) https://doi.org/10.1117/12.2652601

KEYWORDS: Elastography, In vivo imaging, Optical tomography, Optical imaging, Tissues, Phase shifts, Optical coherence tomography, Biomedical optics, Ultrasonography, Tomography

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Proceedings Article | 3 December 2021 Paper

Digital holography-based quantitative elastography using noise-correlation

Agathe Marmin, Simon Chatelin, Manuel Flury, Sybille Facca, Stefan Catheline, Amir Nahas

Proceedings Volume 11921, 1192108 (2021) https://doi.org/10.1117/12.2615455

KEYWORDS: Digital holography, Elastography, Tissues, Point spread functions, Optical coherence tomography, Holography, Polymers, Anisotropy, Actuators, Tissue optics

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SPIE Journal Paper | 19 August 2021 Open Access

Time-of-flight and noise-correlation-inspired algorithms for full-field shear-wave elastography using digital holography

Agathe Marmin, Gabrielle Laloy-Borgna, Sybille Facca, Sylvain Gioux, Stefan Catheline, Amir Nahas

JBO, Vol. 26, Issue 08, 086006, (August 2021) https://doi.org/10.1117/12.10.1117/1.JBO.26.8.086006

KEYWORDS: Elastography, Wave propagation, Tissues, Digital holography, Algorithm development, Video, Computer simulations, Speckle, Signal to noise ratio, Correlation function

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Significance: Quantitative stiffness information can be a powerful aid for tumor or fibrosis diagnosis. Currently, very promising elastography approaches developed for non-contact biomedical imaging are based on transient shear-waves imaging. Transient elastography offers quantitative stiffness information by tracking the propagation of a wave front. The most common method used to compute stiffness from the acquired propagation movie is based on shear-wave time-of-flight calculations. Aim: We introduce an approach to transient shear-wave elastography with spatially coherent sources, able to yield full-field quantitative stiffness maps with reduced artifacts compared to typical artifacts observed in time-of-flight. Approach: A noise-correlation algorithm developed for passive elastography is adapted to spatially coherent narrow or any band sources. This noise-correlation-inspired (NCi) method is employed in parallel with a classic time-of-flight approach. Testing is done on simulation images, experimental validation is conducted with a digital holography setup on controlled homogeneous samples, and full-field quantitative stiffness maps are presented for heterogeneous samples and ex-vivo biological tissues. Results: The NCi approach is first validated on simulations images. Stiffness images processed by the NCi approach on simulated inclusions display significantly less artifacts than with a time-of-flight reconstruction. The adaptability of the NCi algorithm to narrow or any band shear-wave sources was tested successfully. Experimental testing on homogeneous samples demonstrates similar values for both the time-of-flight and the NCi approach. Soft inclusions in agarose sample could be resolved using the NCi method and feasibility on ex-vivo biological tissues is presented. Conclusions: The presented NCi approach was successful in computing quantitative full-field stiffness maps with narrow and broadband source signals on simulation and experimental images from a digital holography setup. Results in heterogeneous media show that the NCi approach could provide stiffness maps with less artifacts than with time-of-flight, demonstrating that a NCi algorithm is a promising approach for shear-wave transient elastography with spatially coherent sources.

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Proceedings Article | 5 March 2021 Presentation

Quantitative full-field transient elastography based on digital holography

Agathe Marmin, Gabrielle Laloy-Borgna, Sybille Facca, Sylvain Gioux, Stefan Catheline, Amir Nahas

Proceedings Volume 11645, 116450A (2021) https://doi.org/10.1117/12.2578581

KEYWORDS: Elastography, Digital holography, Wave propagation, Ultrasonography, Tissues, Optical coherence tomography, Natural surfaces, Mach-Zehnder interferometers, Cameras

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Proceedings Article | 5 March 2021 Poster + Presentation

Noise-correlation-based elastography using digital holography in anisotropic media

Agathe Marmin, Simon Chatelin, Stefan Catheline, Amir Nahas

Proceedings Volume 11645, 116451E (2021) https://doi.org/10.1117/12.2578645

KEYWORDS: Elastography, Digital holography, Tissues, Optical coherence tomography, Wave propagation, Polymers, Optical properties, Optical imaging, Mach-Zehnder interferometers, Imaging systems

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Proceedings Article | 5 March 2021 Presentation

Time-reversal-based passive elastography using full-field digital holography

Agathe Marmin, Stefan Catheline, Amir Nahas

Proceedings Volume 11645, 116450D (2021) https://doi.org/10.1117/12.2578560

KEYWORDS: Elastography, Digital holography, Tissues, Optical coherence tomography, Ultrasonography, Phase measurement, Magnetic resonance imaging, Tissue optics, Optical resolution, In vivo imaging

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Proceedings Article | 2 October 2018 Presentation + Paper

Developments of EUV/x-ray wavefront sensors and adaptive optics at Imagine Optic

Ombeline de La Rochefoucauld, Samuel Bucourt, Daniele Cocco, Guillaume Dovillaire, Fabrice Harms, Mourad Idir, Dietmar Korn, Xavier Levecq, Agathe Marmin, Lionel Nicolas, Martin Piponnier, Lorenzo Raimondi, Philippe Zeitoun

Proceedings Volume 10761, 107610E (2018) https://doi.org/10.1117/12.2320927

KEYWORDS: Sensors, Wavefronts, Extreme ultraviolet, Wavefront sensors, Mirrors, X-rays, X-ray optics, Adaptive optics, Monochromatic aberrations, EUV optics

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Showing 5 of 10 publications

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