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Bocoum M, Figliolia F, Huignard JP, Ramaz F, Tualle JM. Suppression of the Talbot effect in Fourier transform acousto-optic imaging. APPLIED OPTICS 2023; 62:4740-4746. [PMID: 37707246 DOI: 10.1364/ao.488757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 05/22/2023] [Indexed: 09/15/2023]
Abstract
We report on the observation and correction of an imaging artifact attributed to the Talbot effect in the context of acousto-optic imaging using structured acoustic waves. When ultrasound waves are emitted with a periodic structure, the Talbot effect produces π-phase shifts of that periodic structure at every half of the Talbot distance in propagation. This unwanted artifact is detrimental to the image reconstruction, which assumes near-field diffraction is negligible. Here, we demonstrate both theoretically and experimentally how imposing an additional phase modulation on the acoustic periodic structure induces a symmetry constraint leading to the annihilation of the Talbot effect. This will significantly improve the acousto-optic image reconstruction quality and allows for an improvement of the reachable spatial resolution of the image.
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Omidali M, Mardanshahi A, Särestöniemi M, Zhao Z, Myllylä T. Acousto-Optics: Recent Studies and Medical Applications. BIOSENSORS 2023; 13:186. [PMID: 36831952 PMCID: PMC9953934 DOI: 10.3390/bios13020186] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 01/16/2023] [Accepted: 01/20/2023] [Indexed: 05/31/2023]
Abstract
Development of acousto-optic (AO) techniques has made progress in recent years across a range of medical application fields, especially in improving resolution, detection speed, and imaging depth. This paper presents a comprehensive overview of recent advancements in AO-based techniques that have been presented after the previously published review in 2017. The survey covers a description of theoretical modeling strategies and numerical simulation methods as well as recent applications in medical fields. It also provides a comparison between different techniques in terms of complexity, achieved depth in tissue, and resolution. In addition, a comparison between different numerical simulation methods will be outlined. Additionally, a number of challenges faced by AO techniques are considered, particularly in the context of realistic in vivo imaging. Finally, the paper discusses prospects of AO-based medical diagnosis methods.
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Affiliation(s)
- Mohammadreza Omidali
- Optoelectronics and Measurement Techniques Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, 90570 Oulu, Finland
| | - Ali Mardanshahi
- Research Unit of Health Sciences and Technology, Faculty of Medicine, University of Oulu, 90220 Oulu, Finland
| | - Mariella Särestöniemi
- Research Unit of Health Sciences and Technology, Faculty of Medicine, University of Oulu, 90220 Oulu, Finland
- Center for Wireless Communications, University of Oulu, 90570 Oulu, Finland
| | - Zuomin Zhao
- Optoelectronics and Measurement Techniques Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, 90570 Oulu, Finland
| | - Teemu Myllylä
- Optoelectronics and Measurement Techniques Research Unit, Faculty of Information Technology and Electrical Engineering, University of Oulu, 90570 Oulu, Finland
- Research Unit of Health Sciences and Technology, Faculty of Medicine, University of Oulu, 90220 Oulu, Finland
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Thai QM, Kalot G, Venet C, Seguin J, Bocoum M, Mignet N, Ramaz F, Louchet-Chauvet A. In vivo ultrasound modulated optical tomography with a persistent spectral hole burning filter. BIOMEDICAL OPTICS EXPRESS 2022; 13:6484-6496. [PMID: 36589564 PMCID: PMC9774882 DOI: 10.1364/boe.475449] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 10/18/2022] [Accepted: 10/18/2022] [Indexed: 06/03/2023]
Abstract
We present in vivo ultrasound modulated optical tomography (UOT) results on mice, using the persistent spectral hole burning (PSHB) effect in a Tm3+:YAG crystal. Indocyanine green (ICG) solution was injected as an optical absorber and was clearly identified on the PSHB-UOT images, both in the muscle (following an intramuscular injection) and in the liver (following an intravenous injection). This demonstration also validates an experimental setup with an improved level of performance combined with an increased technological maturity compared to previous demonstrations.
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Affiliation(s)
- Quang Minh Thai
- Institut Langevin, ESPCI Paris, Université PSL, CNRS, 1 rue Jussieu, 75005 Paris, France
| | - Ghadir Kalot
- Université de Paris Cité, INSERM, CNRS, UTCBS, Faculté de Pharmacie, 4 avenue de l’Observatoire, 75006 Paris, France
| | - Caroline Venet
- Institut Langevin, ESPCI Paris, Université PSL, CNRS, 1 rue Jussieu, 75005 Paris, France
| | - Johanne Seguin
- Université de Paris Cité, INSERM, CNRS, UTCBS, Faculté de Pharmacie, 4 avenue de l’Observatoire, 75006 Paris, France
| | - Maïmouna Bocoum
- Institut Langevin, ESPCI Paris, Université PSL, CNRS, 1 rue Jussieu, 75005 Paris, France
| | - Nathalie Mignet
- Université de Paris Cité, INSERM, CNRS, UTCBS, Faculté de Pharmacie, 4 avenue de l’Observatoire, 75006 Paris, France
| | - François Ramaz
- Institut Langevin, ESPCI Paris, Université PSL, CNRS, 1 rue Jussieu, 75005 Paris, France
| | - Anne Louchet-Chauvet
- Institut Langevin, ESPCI Paris, Université PSL, CNRS, 1 rue Jussieu, 75005 Paris, France
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Bengtsson A, Hill D, Shortiss K, Rippe L, Kröll S. Comparison of contrast-to-noise ratios of different detection methods in ultrasound optical tomography. BIOMEDICAL OPTICS EXPRESS 2022; 13:4834-4850. [PMID: 36187237 PMCID: PMC9484419 DOI: 10.1364/boe.457075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 04/22/2022] [Accepted: 05/13/2022] [Indexed: 06/16/2023]
Abstract
Ultrasound optical tomography (UOT) is a hybrid imaging modality based on interaction between ultrasound and light, with a potential to extend optical imaging capabilities in biological tissues to depths of several centimeters. Several methods have been developed to detect the UOT signal. To better understand their potential for deep tissue imaging, we present a theoretical contrast-to-noise comparison between the spectral hole burning, single-shot off-axis holography, speckle contrast, and photorefractive detection methods for UOT. Our results indicate that spectral hole burning filters have the potential to reach the largest imaging depths. We find that digital off-axis holography and photorefractive detection can have good contrast-to-noise ratio at significant depths. The speckle contrast method has a smaller penetration depth comparatively.
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Affiliation(s)
- Alexander Bengtsson
- Lund University, Atomic Physics Division, Department of Physics, Professorsgatan 1, Lund, 22363, Sweden
| | - David Hill
- Lund University, Atomic Physics Division, Department of Physics, Professorsgatan 1, Lund, 22363, Sweden
- SpectraCure AB, Gasverksgatan 1, Lund, 22229, Sweden
| | - Kevin Shortiss
- Lund University, Atomic Physics Division, Department of Physics, Professorsgatan 1, Lund, 22363, Sweden
| | - Lars Rippe
- Lund University, Atomic Physics Division, Department of Physics, Professorsgatan 1, Lund, 22363, Sweden
| | - Stefan Kröll
- Lund University, Atomic Physics Division, Department of Physics, Professorsgatan 1, Lund, 22363, Sweden
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Nowak LJ, Steenbergen W. Self-synchronized reflection-mode acousto-optic imaging system utilizing nanosecond laser pulses. BIOMEDICAL OPTICS EXPRESS 2021; 12:7297-7314. [PMID: 35003834 PMCID: PMC8713671 DOI: 10.1364/boe.444270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 10/26/2021] [Accepted: 10/26/2021] [Indexed: 06/14/2023]
Abstract
We present an acousto-optic imaging system operating in reflection-mode and utilizing a pair of compact, triggerable lasers with 532 and 1064 nm wavelength and nanosecond pulse duration. The system maps the fluence rate distribution of light transmitted through optically scattering samples. The imaging is performed using an acousto-optic probe comprising an ultrasound linear array with attached optical fiber on one side and a camera on the other. The described hardware configuration images samples with access restricted to one side only and ensures mobility of the entire setup. The major challenge of the introduced approach is mitigating the effects of laser parameter instabilities and precise synchronization of ultrasound and laser pulses. We solved this issue by developing an electronic feedback circuit and a microcontroller-based synchronization and control system triggering the ultrasound scanner. Schematics and details regarding control algorithms are introduced. The imaging performance of the system is demonstrated on examples of results obtained for solid, acoustically-homogeneous and optically scattering phantoms with and without light absorbing inclusions present. Adjusting the size and location of the region of interest within the camera sensor matrix and the number of laser pulses illuminating every frame allows for significant improvements in terms of the achievable peak signal to noise ratio. We demonstrate that the developed synchronization algorithm and system play a crucial role in ensuring imaging quality and accuracy.
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Nowak LJ, Steenbergen W. Reflection-mode acousto-optic imaging using plane wave ultrasound pulses. JOURNAL OF BIOMEDICAL OPTICS 2021; 26:JBO-210149R. [PMID: 34472243 PMCID: PMC8408765 DOI: 10.1117/1.jbo.26.9.096001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Accepted: 08/11/2021] [Indexed: 06/13/2023]
Abstract
SIGNIFICANCE Performance of an acousto-optic imaging system is limited by light fluence rate and acoustic pressure field distributions characteristics. In optically scattering media, the former determines the achievable contrast, whereas the latter the imaging resolution. The system parameters can be shaped by changing relative positions of ultrasound (US) transducer array and optodes. However, in the case of many potential clinical applications, optimization possibilities in this regard are limited, as a sample is accessible from one side only and using a water tank for coupling is not feasible. AIM We investigate the possibilities of improving performance of an acousto-optic imaging system operating in reflection mode geometry with linear US array in direct contact with a sample using plane wave instead of focused US pulses. APPROACH Differences in acoustic pressure field distributions for various transducer excitation patterns were determined numerically and experimentally. Acousto-optic images of phantoms with and without optically absorbing inclusions were acquired by measuring laser speckle contrast decrease due to the light modulation by plane wave and focused US pulses with different apodization patterns. RESULTS The residual acoustic pressure field components occupy relatively large volume and contribute to light modulation. Using nonsteered plane wave US pulses instead of focused ones allows one to mitigate their influence. It also allows one to obtain clear two-dimensional reconstructions of light fluence rate maps by shifting transducer apodization along the lateral direction. CONCLUSIONS Using nonsteered plane wave US pulses allows one to achieve better imaging performance than with focused pulses in the assumed system geometry.
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Affiliation(s)
- Lukasz J. Nowak
- University of Twente, Faculty of Science and Technology, Biomedical Photonic Imaging Group, Enschede, The Netherlands
| | - Wiendelt Steenbergen
- University of Twente, Faculty of Science and Technology, Biomedical Photonic Imaging Group, Enschede, The Netherlands
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Dutheil L, Bocoum M, Fink M, Popoff SM, Ramaz F, Tualle JM. Fourier transform acousto-optic imaging with off-axis holographic detection. APPLIED OPTICS 2021; 60:7107-7112. [PMID: 34612995 DOI: 10.1364/ao.427181] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/07/2021] [Accepted: 07/14/2021] [Indexed: 06/13/2023]
Abstract
Acousto-optic (AO) imaging is an in-depth optical imaging technique of highly scattering media. One challenging end-application for this technique is to perform imaging of living biological tissues. Indeed, because it relies on coherent illumination, AO imaging is sensitive to speckle decorrelation occurring on the millisecond time scale. Camera-based detections are well suited for in vivo imaging provided their integration time is lower than those decorrelation time scales. We present Fourier transform acousto-optic imaging combined with off-axis holography, which relies on plane waves and long-duration pulses. We demonstrate, for the first time to the best of our knowledge, a two-dimensional imaging system fully compatible with in vivo imaging prerequisites. The method is validated experimentally by performing in-depth imaging inside a multiple scattering sample.
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Nowak LJ, Steenbergen W. Reflection-mode acousto-optic imaging using a one-dimensional ultrasound array with electronically scanned focus. JOURNAL OF BIOMEDICAL OPTICS 2020; 25:JBO-200183R. [PMID: 32885621 PMCID: PMC7470216 DOI: 10.1117/1.jbo.25.9.096002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Accepted: 08/24/2020] [Indexed: 05/03/2023]
Abstract
SIGNIFICANCE Practical implementation of acousto-optic imaging (AOI) encounters difficulties that prevent it from rapid adoption in clinical use. In many practical medical applications, the region of interest may be accessed only from one side, and using a water tank for coupling is not feasible. The solution might be to use reflection-mode imaging with an electronically scanned ultrasound (US) focus. Such an approach, however, entails considerable challenges. AIM The possibilities of detecting and localizing light-absorbing inclusions inside turbid media by combining reflection-mode AOI conducted using a one-dimensional US array with electronic scanning of the US focus are investigated experimentally and signal processing algorithms that could be used for this purpose are introduced. APPROACH We determine the speckle contrast decrease due to the acousto-optic effect as a function of the US focal point coordinates. Different signal postprocessing techniques are investigated. RESULTS A significant decrease in the determined speckle contrast difference values is observed due to the presence of light-absorbing inclusions. However, local minima occur in the plots only under specific conditions. Subtracting individual distributions and determining symmetry deviations allow for localizing the inclusions. CONCLUSIONS Detection and localization of optically distinct regions are possible using the introduced approach. Signal postprocessing is required in a general case.
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Affiliation(s)
- Lukasz J. Nowak
- University of Twente, Faculty of Science and Technology, Biomedical Photonic Imaging Group, Enschede, The Netherlands
| | - Wiendelt Steenbergen
- University of Twente, Faculty of Science and Technology, Biomedical Photonic Imaging Group, Enschede, The Netherlands
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Bocoum M, Gennisson JL, Grabar AA, Ramaz F, Tualle JM. Reconstruction of bi-dimensional images in Fourier-transform acousto-optic imaging. OPTICS LETTERS 2020; 45:4855-4858. [PMID: 32870875 DOI: 10.1364/ol.396688] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 07/25/2020] [Indexed: 06/11/2023]
Abstract
We present a new, to the best of our knowledge, method to perform acousto-optic imaging based on a spatiotemporal structuration of long-duration acoustic plane waves. This approach is particularly relevant when using detectors with long integration times. We show how it is possible to reconstruct an image by measuring its two-dimensional Fourier components. A proof of concept is presented using a photorefractive detection scheme, demonstrating equal performances to direct imaging. The overall acquisition time is compatible with medical monitoring applications.
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Zuo Q, Geng Y, Shen C, Tan J, Liu S, Liu Z. Accurate angle estimation based on moment for multirotation computation imaging. APPLIED OPTICS 2020; 59:492-499. [PMID: 32225336 DOI: 10.1364/ao.59.000492] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2019] [Accepted: 12/02/2019] [Indexed: 06/10/2023]
Abstract
In a multirotation computation imaging system, the fidelity of the reconstructed result is limited by the accuracy of the estimated rotation angles. Here, an accurate angle detection method using image moment is proposed to estimate angles of diffraction images. The second moment of a digital image is adopted as the rotational inertia in order to estimate angles of diffraction images. Compared with previous versions based on Radon/Hough transform, it has higher accuracy and is simultaneously time-saving, which is verified in both simulation and experiment. The angle error of moment method is narrowed down within 0.1°, or even less, and it also can perform well in sample diversity or when slightly out of focus.
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