Prof. Mathias Fink Profile

Prof. Mathias Fink

Director of the Langevin Institute at Institut Langevin Ondes et Images

SPIE Involvement:

Author

Publications (48)

Proceedings Article | 18 June 2024 Presentation

Multi-conjugate reflection matrix approach for deep imaging in biological media

Jad Aoun, Paul Balondrade, Victor Barolle, Claude Boccara, Mathias Fink, Alexandre Aubry

Proceedings Volume PC12996, PC129960F (2024) https://doi.org/10.1117/12.3016922

KEYWORDS: Adaptive optics, Matrices, Multiple scattering, Geometrical optics, Speckle, Reflection, Optical imaging, Numerical simulations, Microscopy, Medium wave

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Proceedings Article | 7 March 2022 Presentation

Compact multimodal TD-FF-OCT + SD-OCT device for diagnosing clinical cases in anterior eye

Viacheslav Mazlin, Kristina Irsch, Michel Paques, Jose Sahel, Mathias Fink, Kate Grieve, Claude Boccara

Proceedings Volume PC11948, PC119480F (2022) https://doi.org/10.1117/12.2610167

KEYWORDS: Eye, Surgery, Pathology, Optical coherence tomography, Ophthalmology, Image resolution

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Proceedings Article | 9 December 2021 Paper

Detecting subcellular dynamic behaviours with dynamic full-field OCT on stressed retinal pigment epithelium cell cultures

Kassandra Groux, Anna Verschueren, Mathias Fink, Claude Boccara, Sacha Reichman, Kate Grieve

Proceedings Volume 11924, 1192403 (2021) https://doi.org/10.1117/12.2616003

KEYWORDS: Optical coherence tomography, Retina, Optical flow, Eye, Stem cells, RGB color model, Ophthalmology, Microscopes, Interferometry, Interferometers

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Proceedings Article | 5 March 2021 Presentation

Dynamic full-field optical coherence tomography of retinal pigment epithelium cell cultures to model degenerative diseases

Kassandra Groux, Jules Scholler, Anna Verschueren, Marie Darche, Leyna Boucherit, Pedro Mecê, Valérie Fradot, Jean-Marie Chassot, Mathias Fink, Sacha Reichman, Michel Paques, Claude Boccara, Olivier Thouvenin, Kate Grieve

Proceedings Volume 11630, 1163014 (2021) https://doi.org/10.1117/12.2581048

KEYWORDS: Optical coherence tomography, Motion models, 3D modeling, In vitro testing, Stem cells, Regenerative medicine, Optical flow

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Proceedings Article | 5 March 2021 Presentation

Matrix approach of adaptive optics for the imaging of scattering media

Ulysse Najar, Paul Balondrade, Victor Barolle, Laura Cobus, Claude Boccara, Mathias Fink, Alexandre Aubry

Proceedings Volume 11652, 1165206 (2021) https://doi.org/10.1117/12.2583008

KEYWORDS: Scattering media, Adaptive optics, Tissues, Multiple scattering, Image resolution, Optical microscopy, In vivo imaging, Wavefronts, Resolution enhancement technologies, Refractive index

Proceedings Article | 5 March 2021 Presentation

Optical phase modulation by natural eye movements: application to time-domain FF-OCT image retrieval

Viacheslav Mazlin, Peng Xiao, Kristina Irsch, Jules Scholler, Kassandra Groux, Kate Grieve, Mathias Fink, Claude Boccara

Proceedings Volume 11630, 116300G (2021) https://doi.org/10.1117/12.2583413

KEYWORDS: Eye, Image retrieval, Phase modulation, Tomography, Phase shift keying, Optical coherence tomography, Modulation, In vivo imaging, Ophthalmic imaging, Data acquisition

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Proceedings Article | 10 October 2020 Presentation

In vivo real-time full-field OCT imaging and angiography of human eye

Peng Xiao, Viacheslav Mazlin, A. Claude Boccara, Mathias Fink, Jin Yuan

Proceedings Volume 11553, 115530R (2020) https://doi.org/10.1117/12.2574193

KEYWORDS: Optical coherence tomography, In vivo imaging, Real time imaging, Angiography, Eye, Cornea, Confocal microscopy, Microscopes, Imaging systems, Blood circulation

Proceedings Article | 1 April 2020 Open Access

Shear wave elastography: from ultrasound to optics: past and future (Conference Presentation)

Mathias Fink

Proceedings Volume 11242, 112420B (2020) https://doi.org/10.1117/12.2540509

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Proceedings Article | 11 March 2020 Presentation

Distortion matrix concept for deep imaging in optical coherence microscopy (Conference Presentation)

Alexandre Aubry, Amaury Badon, Victor Barolle, Kristina Irsch, Albert Boccara, Mathias Fink

Proceedings Volume 11248, 1124804 (2020) https://doi.org/10.1117/12.2544828

KEYWORDS: Coherence imaging, Distortion, Optical imaging, Optical coherence microscopy, Multiple scattering, Cornea, Information theory, Image information entropy, Opacity, Image resolution

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Proceedings Article | 11 March 2020 Presentation

Matrix approach of Full-Field OCT for volumetric imaging of an opaque monkey cornea (Conference Presentation)

Paul Balondrade, Victor Barolle, Kristina Irsch, Claude Boccara, Mathias Fink, Alexandre Aubry

Proceedings Volume 11248, 112480M (2020) https://doi.org/10.1117/12.2543707

KEYWORDS: Optical coherence tomography, Cornea, Opacity, Multiple scattering, Adaptive optics, Distortion, Optical microscopy, Tissue optics, Diffraction, Image resolution

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Proceedings Article | 9 March 2020 Presentation

Adaptive glasses-assisted Full-Field OCT for SNR enhanced 3D high-resolution retinal imaging (Conference Presentation)

Pedro Mecê, Jules Scholler, Kassandra Groux, Mathias Fink, Kate Grieve, Claude Boccara

Proceedings Volume 11228, 112281O (2020) https://doi.org/10.1117/12.2544277

KEYWORDS: Adaptive optics, Eye, Optical coherence tomography, Signal to noise ratio, 3D image enhancement, 3D image processing, Retinal scanning, Glasses, In vivo imaging, Aberration correction

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Proceedings Article | 9 March 2020 Presentation

Increased field-of-view full-field OCT for 3D high-resolution retinal imaging (Conference Presentation)

Pedro Mecê, Kassandra Groux, Jules Scholler, Mathias Fink, Kate Grieve, Claude Boccara

Proceedings Volume 11218, 112180S (2020) https://doi.org/10.1117/12.2544256

KEYWORDS: 3D image processing, Optical coherence tomography, Retinal scanning, Adaptive optics, Retina, Eye, Coherence (optics), Complex systems, In vivo imaging, Tomography

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Proceedings Article | 9 March 2020 Presentation

Clinical trial of retinal and choroidal angiography by laser Doppler holography (Conference Presentation)

Michael Atlan, Leo Puyo, Michel Paques, Jose-Alain Sahel, Mathias Fink

Proceedings Volume 11218, 112180C (2020) https://doi.org/10.1117/12.2543942

KEYWORDS: Doppler effect, Clinical trials, Angiography, Holography, Blood circulation, Eye, Temporal resolution, Retina, Arteries, Veins

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Proceedings Article | 9 March 2020 Presentation

Laser Doppler holography for full-field and high-speed blood flow imaging in the human retina (Conference Presentation)

Michael Atlan, Jose-Alain Sahel, Mathias Fink, Leo Puyo, Michel Paques

Proceedings Volume 11239, 112390Q (2020) https://doi.org/10.1117/12.2546323

KEYWORDS: Doppler effect, Holography, Blood circulation, Retina, Holograms, Fourier transforms, Blood, Arteries, Veins, Temporal resolution

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Proceedings Article | 21 June 2019 Presentation + Paper

Analysis of retinal and choroidal images measured by laser Doppler holography

L. Puyo, M. Paques, M. Fink, J.-A. Sahel, M. Atlan

Proceedings Volume 11060, 110600O (2019) https://doi.org/10.1117/12.2530151

KEYWORDS: Doppler effect, Blood circulation, Arteries, Veins, Retina, Doppler tomography, Holography, Temporal resolution, Eye

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Proceedings Article | 13 March 2019 Presentation

Non-invasive and high temporal resolution choroidal and retinal blood flow imaging using laser Doppler holography (Conference Presentation)

Leo Puyo, Michel Paques, Mathias Fink, José-Alain Sahel, Michael Atlan

Proceedings Volume 10858, 1085811 (2019) https://doi.org/10.1117/12.2506157

KEYWORDS: Doppler effect, Holography, Blood circulation, Temporal resolution, Retina, Motion measurement, Pathophysiology, In vivo imaging, Optical testing, Cameras

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Proceedings Article | 4 March 2019 Presentation

Towards lens-based wavefront sensorless adaptive optics full-field OCT for in-vivo retinal imaging (Conference Presentation)

Pedro Mecê, Peng Xiao, Viacheslav Mazlin, Jules Scholler, Kate Grieve, José-Alain Sahel, Mathias Fink, Claude Boccara

Proceedings Volume 10867, 1086722 (2019) https://doi.org/10.1117/12.2508630

KEYWORDS: In vivo imaging, Retinal scanning, Optical coherence tomography, Wavefronts, 3D image processing, Adaptive optics, Stereoscopy, 3D metrology, Sensors, Eyeglasses

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Proceedings Article | 4 March 2019 Presentation

Subcellular quantitative dynamic imaging: from metabolic activity to cell tracking of retinal and corneal structure (Conference Presentation)

Jules Scholler, Kassandra Groux, Sacha Reichman, Michel Pâques, Olivier Goureau, José Sahel, Mathias Fink, Claude Boccara, Kate Grieve

Proceedings Volume 10867, 108670E (2019) https://doi.org/10.1117/12.2511437

KEYWORDS: Image processing, Signal processing, Therapeutics, Motion analysis, Optical coherence tomography, Stem cells, Pathophysiology, Image analysis, Mode conditioning cables, GPU based image processing

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Proceedings Article | 4 September 2018 Open Access

Wave control with "time materials" (Conference Presentation)

Mathias Fink

Proceedings Volume 10719, 1071904 (2018) https://doi.org/10.1117/12.2326653

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Proceedings Article | 15 March 2018 Presentation

Scattering reflection matrix approach to ultra-deep imaging through biological media (Conference Presentation)

Laura Cobus, Amaury Badon, Dayan Li, Geoffroy Lerosey, Claude Boccara, Mathias Fink, Alexandre Aubry

Proceedings Volume 10502, 105020Y (2018) https://doi.org/10.1117/12.2290704

KEYWORDS: Optical imaging, Light scattering, Scattering, Multiple scattering, Optical coherence tomography, Image processing, Spatial light modulators, CCD cameras, Image enhancement, Tissues

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Proceedings Article | 14 March 2018 Presentation

Laser Doppler perfusion imaging of human retina using digital holography (Conference Presentation)

Leo Puyo, Mathias Fink, Michel Paques, Michael Atlan

Proceedings Volume 10474, 1047405 (2018) https://doi.org/10.1117/12.2289484

KEYWORDS: Doppler effect, Retina, Holography, In vivo imaging, Polarization, Eye, Near infrared, Beam splitters, CMOS sensors

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Proceedings Article | 14 March 2018 Presentation

Ultrahigh resolution imaging of cellular dynamics in explanted corneas and retinas with ocular pathologies using dynamic full-field OCT (Conference Presentation)

Olivier Thouvenin, Jules Scholler, Albert Claude Boccara, Michel Paques, José-Alain Sahel, Mathias Fink, Katharine Grieve

Proceedings Volume 10474, 104740T (2018) https://doi.org/10.1117/12.2289921

KEYWORDS: Optical coherence tomography, Cornea, Retina, Pathology, Tissues, Image resolution

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Proceedings Article | 19 February 2018 Paper

In vivo imaging through the entire thickness of human cornea by full-field optical coherence tomography

Viacheslav Mazlin, Peng Xiao, Eugénie Dalimier, Kate Grieve, Kristina Irsch, José Sahel, Mathias Fink, Claude Boccara

Proceedings Volume 10474, 104740S (2018) https://doi.org/10.1117/12.2288947

KEYWORDS: Cornea, In vivo imaging, Optical coherence tomography, Image resolution, Eye, Cameras, Visualization, Imaging devices, Microscopes, Nerve

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Proceedings Article | 1 August 2017 Paper

Combining FF-OCT with SD-OCT for retinal imaging

Peng Xiao, Mathias Fink, A. Claude Boccara

Proceedings Volume 10416, 104160K (2017) https://doi.org/10.1117/12.2279937

KEYWORDS: Retinal scanning, Optical coherence tomography, Microscopy

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Proceedings Article | 16 May 2017 Presentation

Non-contact full-field optical coherence tomography: a novel tool for in vivo imaging of the human cornea (Conference Presentation)

Viacheslav Mazlin, Eugénie Dalimier, Katharine Grieve, Kristina Irsch, José-Alain Sahel, Mathias Fink, A. Claude Boccara

Proceedings Volume 10045, 1004519 (2017) https://doi.org/10.1117/12.2251343

KEYWORDS: Image resolution, Medicine, In vivo imaging, Cornea, Optical coherence tomography, Eye, Imaging systems, Diagnostics, Confocal microscopy, Cameras

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Proceedings Article | 16 May 2017 Presentation

High resolution imaging of intracellular dynamics in explanted retinas with dynamic full-field OCT (Conference Presentation)

Olivier Thouvenin, A. Claude Boccara, Michel Paques, José-Alain Sahel, Mathias Fink, Kate Grieve

Proceedings Volume 10045, 100450M (2017) https://doi.org/10.1117/12.2252553

KEYWORDS: Optical coherence tomography, Retina, Nerve, Tissues, Image resolution, Axons, Capillaries, Structured optical fibers, Mode conditioning cables, Luminescence

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Proceedings Article | 24 April 2017 Presentation

Fluorescence exclusion: A simple versatile technique to calculate cell volumes and local heights (Conference Presentation)

Olivier Thouvenin, Mathias Fink, A. Claude Boccara

Proceedings Volume 10074, 100740O (2017) https://doi.org/10.1117/12.2252531

KEYWORDS: Current controlled current source, Luminescence, Refractive index, Phase imaging, Proteins, Phase measurement

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Proceedings Article | 24 April 2017 Presentation

A PSF width independent of aberrations in spatially incoherent interferometry (Conference Presentation)

Peng Xiao, Mathias Fink, A. Claude Boccara

Proceedings Volume 10073, 1007315 (2017) https://doi.org/10.1117/12.2250011

KEYWORDS: Point spread functions, Imaging systems, Optical coherence tomography, Interferometry, Adaptive optics, Wavefronts, Optical imaging, Microscopes, Retinal scanning, Monochromatic aberrations

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Proceedings Article | 24 April 2017 Presentation

Passive optical coherence elastography using a time-reversal approach (Conference Presentation)

Thu-Mai Nguyen, Ali Zorgani, Mathias Fink, Stefan Catheline, A. Claude Boccara

Proceedings Volume 10067, 1006707 (2017) https://doi.org/10.1117/12.2251839

KEYWORDS: Elastography, Coherence (optics), Tissue optics, Tissues, In vivo imaging, Wave propagation, Ultrafast imaging, Imaging systems, Natural surfaces, Actuators

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Proceedings Article | 17 February 2017 Presentation + Paper

Retinal imaging with adaptive optics full-field OCT

Peng Xiao, Mathias Fink, A. Claude Boccara

Proceedings Volume 10053, 100530K (2017) https://doi.org/10.1117/12.2250012

KEYWORDS: Adaptive optics, Optical coherence tomography, Aberration correction, Wavefronts, Wavefront distortions, Eye, Monochromatic aberrations, Imaging systems, Objectives

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SPIE Journal Paper | 14 February 2017 Open Access

Dynamic multimodal full-field optical coherence tomography and fluorescence structured illumination microscopy

Olivier Thouvenin, Mathias Fink, Albert Claude Boccara

JBO, Vol. 22, Issue 02, 026004, (February 2017) https://doi.org/10.1117/12.10.1117/1.JBO.22.2.026004

KEYWORDS: Luminescence, Optical coherence tomography, Wave propagation, Objectives, Microscopes, Heart, Tissues, Calcium, Cameras, Microscopy

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SPIE Journal Paper | 21 December 2016 Open Access

Diffuse shear wave imaging: toward passive elastography using low-frame rate spectral-domain optical coherence tomography

Thu-Mai Nguyen, Ali Zorgani, Maxime Lescanne, Claude Boccara, Mathias Fink, Stefan Catheline

JBO, Vol. 21, Issue 12, 126013, (December 2016) https://doi.org/10.1117/12.10.1117/1.JBO.21.12.126013

KEYWORDS: Tissues, Elastography, Optical coherence tomography, Wave propagation, Eye, Ultrafast imaging, In vivo imaging, Cornea, Sclera, Actuators

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SPIE Journal Paper | 22 September 2016 Open Access

Adaptive optics full-field optical coherence tomography

Peng Xiao, Mathias Fink, Albert Claude Boccara

JBO, Vol. 21, Issue 12, 121505, (September 2016) https://doi.org/10.1117/12.10.1117/1.JBO.21.12.121505

KEYWORDS: Adaptive optics, Optical coherence tomography, Wavefronts, Aberration correction, Image resolution, Monochromatic aberrations, Image processing, Eye, Imaging systems, Point spread functions

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Proceedings Article | 27 April 2016 Presentation

Quantitative phase imaging technologies to assess neuronal activity (Conference Presentation)

Olivier Thouvenin, Mathias Fink, Claude Boccara

Proceedings Volume 9718, 97180S (2016) https://doi.org/10.1117/12.2211095

KEYWORDS: Phase measurement, Phase imaging, Neurons, Digital holography, Action potentials, Diffraction, Optical coherence tomography, Luminescence, Calcium, Holography

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Proceedings Article | 27 April 2016 Presentation

Spatio-temporal imaging of light transport in scattering media using white light illumination (Conference Presentation)

Amaury Badon, Dayan Li, Geoffroy Lerosey, Claude Boccara, Mathias Fink, Alexandre Aubry

Proceedings Volume 9717, 971713 (2016) https://doi.org/10.1117/12.2209583

KEYWORDS: Titanium dioxide, Scattering, Light scattering, Scattering media, Optical imaging, Zinc oxide, Statistical analysis, Diffusion, Anisotropy, Tissues

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Proceedings Article | 27 April 2016 Presentation

An optical tomography PSF almost insensitive to aberrations: the benefit of a spatial incoherent illumination (Conference Presentation)

Peng Xiao, Mathias Fink, A. Claude Boccara

Proceedings Volume 9717, 97170I (2016) https://doi.org/10.1117/12.2210950

KEYWORDS: Optical coherence tomography, Point spread functions, Optical tomography, Eye, Signal attenuation, Imaging systems, Image resolution, Wavefront distortions, Diffraction, Image quality

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Proceedings Article | 27 April 2016 Presentation

A matrix approach for optical detection and imaging through highly scattering media (Conference Presentation)

Amaury Badon, Dayan Li, Geoffroy Lerosey, Claude Boccara, Mathias Fink, Alexandre Aubry

Proceedings Volume 9717, 97170W (2016) https://doi.org/10.1117/12.2211556

KEYWORDS: Scattering, Optical imaging, Scattering media, Photons, Multiple scattering, Target detection, Tissue optics, Light scattering, CCD cameras, Interferometry

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Proceedings Article | 26 April 2016 Presentation

Synchronous multimodal combination of full-field OCT and structured illumination fluorescence microscopy (Conference Presentation)

Olivier Thouvenin, Mathias Fink, Claude Boccara

Proceedings Volume 9697, 96972C (2016) https://doi.org/10.1117/12.2214441

KEYWORDS: Microscopy, Tissues, Luminescence, Optical coherence tomography, Tissue optics, Molecules, Temporal resolution, 3D image processing, Image resolution, Environmental sensing

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Proceedings Article | 26 April 2016 Presentation

Adaptive optics full-field OCT: a resolution almost insensitive to aberrations (Conference Presentation)

Peng Xiao, Mathias Fink, A. Claude Boccara

Proceedings Volume 9697, 96970Y (2016) https://doi.org/10.1117/12.2214545

KEYWORDS: Aberration correction, Adaptive optics, Optical coherence tomography, Point spread functions, Structured optical fibers, Imaging systems, Liquid crystals, Eye, Image resolution, Wavefronts

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SPIE Journal Paper | 19 December 2013 Open Access

From supersonic shear wave imaging to full-field optical coherence shear wave elastography

Amir Nahas, Mickael Tanter, Thu-Mai Nguyen, Jean-Marie Chassot, Mathias Fink, A. Claude Boccara

JBO, Vol. 18, Issue 12, 121514, (December 2013) https://doi.org/10.1117/12.10.1117/1.JBO.18.12.121514

KEYWORDS: Elastography, Ultrasonography, Wave propagation, Ultrasonics, Optical coherence tomography, Tissues, Coherence (optics), Optical imaging, Cameras, Biomedical optics

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Proceedings Article | 27 February 2007 Paper

Imaging of optically diffusive media by use of opto-elastography

Emmanuel Bossy, Arik Funke, Khalid Daoudi, Mickael Tanter, Mathias Fink, Claude Boccara

Proceedings Volume 6437, 64370O (2007) https://doi.org/10.1117/12.700524

KEYWORDS: Ultrasonography, Tissue optics, Wave propagation, Ultrasonics, Speckle pattern, Cameras, Acoustics, Acousto-optics, Radiation effects, Speckle

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Proceedings Article | 6 March 2006 Paper

Experimental investigation of time-reversal of photo-acoustic waves

Emmanuel Bossy, Gabriel Montaldo, Michael Tanter, Benoit Forget, François Ramaz, Mathias Fink, Claude Boccara

Proceedings Volume 6086, 60860X (2006) https://doi.org/10.1117/12.646132

KEYWORDS: Ultrasonography, Ultrasonics, Transducers, Acoustics, Optical spheres, Point spread functions, Electronics, Nd:YAG lasers, Tissue optics, Q switched lasers

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Proceedings Article | 30 May 2001 Paper

New method of aberration correction for ultrasonic brain imaging

Jean-Francois Aubry, Jamie Gerber, Mickael Tanter, Jean-Louis Thomas, Mathias Fink

Proceedings Volume 4325, (2001) https://doi.org/10.1117/12.428195

KEYWORDS: Skull, Transducers, Electronic filtering, Brain imaging, Signal processing, Ultrasonics, Wavefronts, Aberration correction, Absorption, Ultrasonography

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Proceedings Article | 30 May 2001 Paper

Time-resolved 2D pulsed elastography: experiments on tissue-equivalent phantoms and breast in vivo

Laurent Sandrin, Mickael Tanter, Stefan Catheline, Mathias Fink

Proceedings Volume 4325, (2001) https://doi.org/10.1117/12.428188

KEYWORDS: Tissues, Ultrasonics, Breast, Wave propagation, Wavefronts, Transducers, In vivo imaging, Ultrasonography, Elastography, Imaging systems

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Proceedings Article | 15 November 1993 Paper

Object detection and imaging with acoustic time reversal mirrors

Mathias Fink

Proceedings Volume 1942, (1993) https://doi.org/10.1117/12.160346

KEYWORDS: Transducers, Mirrors, Acoustics, Wavefronts, Wave propagation, Reflectivity, Ultrasonics, Interfaces, Solids, Titanium

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Proceedings Article | 5 November 1992 Paper

Ultrasonic nondestructive testing with time reversal mirrors

N. Chakroun, Mathias Fink, Fengqing Wu

Proceedings Volume 1733, (1992) https://doi.org/10.1117/12.130611

KEYWORDS: Transducers, Mirrors, Solids, Acoustics, Interfaces, Liquids, Titanium, Ultrasonics, Wavefronts, Reflectivity

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Proceedings Article | 5 November 1992 Paper

Focusing and steering of ultrasonic waves generated by a sixteen-laser source array

Marie-Helene Noroy, Daniel Royer, Mathias Fink

Proceedings Volume 1733, (1992) https://doi.org/10.1117/12.130602

KEYWORDS: Acoustics, Solids, Ultrasonics, Transducers, Pulsed laser operation, Diffusion, Heterodyning, YAG lasers, Phased array optics, Metals

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Proceedings Article | 5 November 1992 Paper

Improved imaging rate through simultaneous transmission of several ultrasound beams

Raoul Mallart, Mathias Fink

Proceedings Volume 1733, (1992) https://doi.org/10.1117/12.130591

KEYWORDS: Ultrasonics, Ultrasonography, Wavefronts, Range imaging, Transmitters, Reflectors, Blood circulation, Transducers, Tissues, Phased arrays

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The main requirement of pulsed-echo ultrasound applications such as cardiac imaging, 3-D imaging, or blood flow imaging can be identified as frame rate. Currently, frame rate is limited by the imaging depth range and the number of ultrasonic fires. For example, a 15 cm imaging range gives rise to 200 microsecond(s) lines or to a 2 s acquisition time for 100 planes of 100 lines in 3-D medical applications. The only way to increase frame rate is parallel beam formation in the receive mode. Simultaneous parallel beam forming allows us to divide the acquisition time by a factor proportional to the number of beam formed lines. In the technique developed by S. W. Smith, an increase frame rate of 16 is achieved. However, this technique is limited by a loss in lateral resolution due to the requirement for a wide illumination beam of the explored medium in the transmit mode. We propose an alternate illumination scheme that minimizes the loss in resolution in the transmit mode. In this technique, ultrasonic energy is transmitted simultaneously in several narrow beams. This technique works in pulsed mode and we have built the hardware needed for the simultaneous production of several beams. Each transducer is connected to a transmitter able to generate a sequence of excitation pulses. If n beams are to be transmitted, the excitation signal is the sum of n cylindrical wave fronts. For those, among elements where the n wave fronts are disjoint, the excitation signal is thus the succession of n pulses with specific time positions with respect to the system synchronization. For the others, the excitation signal is more complex since it consists in a (n - 1) level signal (0, 1, 2, ... n - 1 times the basic excitation signal). We show the performances of such a parallel transmit scheme based on beam plots as well as on tissue phantom images. This leads to an evaluation of the maximal number of beams compatible with current medical imaging quality standards. It is shown that a gain of 16 in the acquisition time can be achieved without any loss in lateral resolution.

Showing 5 of 48 publications

Conference Committee Involvement (4)

Unconventional Optical Imaging

22 April 2018 | Strasbourg, France

Optical Elastography and Tissue Biomechanics III

13 February 2016 | San Francisco, California, United States

Optical Elastography and Tissue Biomechanics II

7 February 2015 | San Francisco, California, United States

Optical Elastography and Tissue Biomechanics

1 February 2014 | San Francisco, California, United States

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