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Bibliografie tematiche / Micro-elastography

Letteratura scientifica selezionata sul tema "Micro-elastography"

Autore: Grafiati

Pubblicato: 1 giugno 2024

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Articoli di riviste sul tema "Micro-elastography":

1

Sanderson, Rowan W., Andrea Curatolo, Philip Wijesinghe, Lixin Chin e Brendan F. Kennedy. "Finger-mounted quantitative micro-elastography". Biomedical Optics Express 10, n. 4 (11 marzo 2019): 1760. http://dx.doi.org/10.1364/boe.10.001760.

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2

Fang, Qi, Brooke Krajancich, Lixin Chin, Renate Zilkens, Andrea Curatolo, Luke Frewer, James D. Anstie et al. "Handheld probe for quantitative micro-elastography". Biomedical Optics Express 10, n. 8 (16 luglio 2019): 4034. http://dx.doi.org/10.1364/boe.10.004034.

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3

Li, Jiayue, Matt S. Hepburn, Lixin Chin, Alireza Mowla e Brendan F. Kennedy. "Analysis of sensitivity in quantitative micro-elastography". Biomedical Optics Express 12, n. 3 (1 marzo 2021): 1725. http://dx.doi.org/10.1364/boe.417829.

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4

Boquet-Pujadas, Aleix, e Jean-Christophe Olivo-Marin. "Multiple variational image assimilation for accessible micro-elastography". Journal of Physics: Conference Series 1131 (novembre 2018): 012014. http://dx.doi.org/10.1088/1742-6596/1131/1/012014.

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5

Laloy-Borgna, G., A. Zorgani e S. Catheline. "Micro-elastography: Toward ultrasonic shear waves in soft solids". Applied Physics Letters 118, n. 11 (15 marzo 2021): 113701. http://dx.doi.org/10.1063/5.0039816.

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6

Es’haghian, Shaghayegh, Kelsey M. Kennedy, Peijun Gong, Qingyun Li, Lixin Chin, Philip Wijesinghe, David D. Sampson, Robert A. McLaughlin e Brendan F. Kennedy. "In vivo volumetric quantitative micro-elastography of human skin". Biomedical Optics Express 8, n. 5 (10 aprile 2017): 2458. http://dx.doi.org/10.1364/boe.8.002458.

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7

Allen, Wes M., Kelsey M. Kennedy, Qi Fang, Lixin Chin, Andrea Curatolo, Lucinda Watts, Renate Zilkens et al. "Wide-field quantitative micro-elastography of human breast tissue". Biomedical Optics Express 9, n. 3 (9 febbraio 2018): 1082. http://dx.doi.org/10.1364/boe.9.001082.

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8

TADANO, Shigeru, Kazuhiro FUJISAKI, Hayato SUZUKI, Seishin TAKAO, Mikio SUGA, Itsuro KAJIWARA, Toru YAMAMOTO, Yu JIANG e Gen NAKAMURA. "Excitation System for Magnetic Resonance Elastography Using Micro MRI". Journal of Biomechanical Science and Engineering 7, n. 4 (2012): 463–74. http://dx.doi.org/10.1299/jbse.7.463.

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9

Kennedy, Brendan F., Robert A. McLaughlin, Kelsey M. Kennedy, Lixin Chin, Andrea Curatolo, Alan Tien, Bruce Latham, Christobel M. Saunders e David D. Sampson. "Optical coherence micro-elastography: mechanical-contrast imaging of tissue microstructure". Biomedical Optics Express 5, n. 7 (9 giugno 2014): 2113. http://dx.doi.org/10.1364/boe.5.002113.

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10

Chin, Lixin, Brendan F. Kennedy, Kelsey M. Kennedy, Philip Wijesinghe, Gavin J. Pinniger, Jessica R. Terrill, Robert A. McLaughlin e David D. Sampson. "Three-dimensional optical coherence micro-elastography of skeletal muscle tissue". Biomedical Optics Express 5, n. 9 (22 agosto 2014): 3090. http://dx.doi.org/10.1364/boe.5.003090.

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Più fonti

Tesi sul tema "Micro-elastography":

1

Laloy-Borgna, Gabrielle. "Micro-élastographie : caractérisation mécanique de la cellule par ondes élastiques". Electronic Thesis or Diss., Lyon 1, 2023. http://www.theses.fr/2023LYO10058.

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Abstract (sommario):

L'élastographie ondulatoire est une méthode d'imagerie visant à mesurer l'élasticité des tissus biologiques de façon non-invasive et quantitative. Récemment, la transposition de la technique à petite échelle baptisée micro-élastographie dynamique a permis de réaliser de premières mesures d'élasticité cellulaire par ondes de cisaillement grâce à un microscope optique. Cette thèse s'attache à en comprendre les limites et à développer de nouvelles méthodes de micro-élastographie, à tester de nouvelles sources d'ondes mais également des applications potentielles de la technique. Dans un premier temps, la dispersion d'ondes de cisaillement a été étudiée sur des gels de gélatine. Deux régimes distincts d'ondes élastiques guidées et d'ondes de cisaillement ont été identifiés. La limite haute fréquence de propagation des ondes a également été explorée, permettant d'établir l'existence d'une fréquence de coupure expliquant l'absence d'imagerie ultrasonore de cisaillement. La même approche a ensuite été appliquée à des fluides visco-élastiques faisant apparaître deux fréquences de coupure et permettant de revisiter les études déjà menées sur la rhéologie et la propagation d'ondes dans ce type de milieux. Puis, l'objectif initial étant de réaliser de la micro-élastographie sur des cellules uniques et les expériences précédemment réalisées avec des micro-pipettes présentant certains défauts, une méthode originale de micro-élastographie cellulaire a été développée. Une micro-bulle oscillante est utilisée comme source d'ondes de cisaillement sans contact à 15 kHz, pour réaliser des expériences sur des cellules sanguines appelées mégacaryocytes dont le diamètre est d'environ 15 µm. Il s'agit en fait des plus petits objets jamais explorés par élastographie. Des objets plus gros, des amas cellulaires de quelques dizaines de milliers de cellules ont également été étudiés. En effet, l'élastographie ultrasonore de ces modèles tumoraux d'environ 800 µm de diamètre étant impossible, la micro-élastographie optique est une technique adaptée. Ces échantillons contiennent des nano-particules magnétiques, donc une impulsion magnétique a pu être utilisée comme source d'ondes. Auparavant, des preuves de concept sur des gels à la fois macroscopiques (en élastographie ultrasonore) et microscopiques (en micro-élastographie optique) ont été menées pour valider l'utilisation de cette source de champ diffus. Enfin, des mesures d'ondes de pouls ont été réalisées sur des artères rétiniennes d'environ 50 µm de diamètre à partir d'acquisitions d'holographie Doppler laser réalisées in vivo. L'application d'algorithmes de corrélation monochromatiques a permis de mesurer la vitesse d'ondes guidées révélant l'existence d'une deuxième onde de pouls, une onde antisymétrique de flexion. Cette onde guidée, beaucoup plus lente que l'onde de pouls axisymétrique étudiée jusqu'à présent, a également été observée sur l'artère carotide grâce à des acquisitions ultrasonores ultrarapides
Dyanmic elastography is an imaging method to measure the elasticity of biological tissues in a non-invasive and quantitative way. Recently, the transposition of the technique to a small scale has been called dynamic micro-elastography and has allowed the first measurements of cellular elasticity by shear waves using an optical microscope. This thesis aims to undetstand the limits of this technique and to develop new micro-elastography methods, to test new wave sources but also potential applications of the technique. In a first step, the dispersion of shear waves was studied on gelatin phantoms. Two distinct regimes of guided elastic waves and shear waves were identified. The high-frequency limit of wave propagation was also explored, establishing the existence of a cutoff frequency which explains the absence of ultrasonic shear imaging. The same approach was then applied to visco-elastic fluids, revealing two cutoff frequencies and revisiting previous studies on rheology and wave propagation in this type of medium. Then, the initial objective being to carry out micro-elastography on single cells and the experiments previously carried out with micro-pipettes presenting certain defects, an original method of cellular micro-elastography was developed. An oscillating microbubble is used as a contactless shear wave source at 15 kHz to perform experiments on blood cells whose diameter is about 15 µm. These are the smallest objects ever explored by elastography. Larger objects, cell clusters of a few tens of thousands of cells have also been studied. Indeed, since ultrasound elastography of these tumour models of about 800 µm in diameter is impossible, optical micro-elastography is a suitable technique. These samples contain magnetic nanoparticles, so a magnetic pulse could be used as a wave source. Previously, proofs of concept on both macroscopic (in ultrasonic elastography) and microscopic (in optical micro-elastography) phantoms were conducted to validate the use of this diffuse field source. Finally, pulse wave measurements were performed on retinal arteries of about 50 µm in diameter using laser Doppler holography acquisitions performed in vivo. The application of monochromatic correlation algorithms allowed the measurement of guided wave velocities, finally revealing the existence of a second pulse wave, an antisymmetric bending wave. This guided wave, much slower than the axisymmetric pulse wave studied so far, was also observed on the carotid artery thanks to ultrafast ultrasound acquisitions

2

Dizeux, Alexandre. "Caractérisation ultrasonore de l'angiogenèse, de l'élasticité et de la microstructure tumorale sous l'effet de thérapies conventionnelles et innovantes". Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066113/document.

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Abstract (sommario):

Les modifications induites par les cellules tumorales sur leur environnement ont pour but de permettre leur développement en remodelant le tissu la soutenant et en créant un nouveau réseau vasculaire (angiogenèse). Plusieurs thérapies anti-angiogéniques inhibant le développement du réseau vasculaire tumoral ont obtenu l’autorisation de mise sur le marché et sont actuellement utilisées en clinique. Ces thérapies induisent de fortes modifications fonctionnelles au sein de la tumeur mais le simple suivi de l’évolution du volume tumoral n’est pas suffisant pour rendre compte de ces modifications. L’objectif principal de la thèse a consisté à utiliser différentes modalités d’imagerie ultrasonore afin d’évaluer leur sensibilité aux modifications générées dans des tumeurs murine (carcinome colorectal et pulmonaire) au cours de plusieurs types de thérapie (chimique : cytotoxique, anti-angiogénique / physique : plasma froid, sono-sensibilisation). Les modifications de la distribution spatiale des micro-vaisseaux et leur fonctionnalité ont été caractérisées à l’aide de l’imagerie de contraste ultrasonore (CEUS), l’altération de la microstructure de la tumeur a été évaluée grâce à l’analyse spectrale des signaux radiofréquences, connu comme « quantitative ultrasound » (QUS) et enfin les variations des propriétés mécaniques des tissus tumoraux ont été mesurées en élastographie à l’aide de la technique « Shear Wave Elastography » (SWE). Afin de comprendre l’origine des modifications observées in vivo, des paramètres standard comme les niveaux de fibrose ou de nécrose ont été caractérisés ex vivo dans le tissu tumoral, grâce à l’immunohistochimie, une technique de référence
Tumor development is complex process made possible thanks to the microenvironment surrounding tumor cell. Modifications induced by tumor cells on their environment enable their own development by remodeling tissues sustaining them and by creating a new vascular network (angiogenesis). The use of several antiangiogenic therapies, inhibiting the sprout of a new vascular network, has been authorized in clinic. These therapies induce strong modifications in tumors at the functional level and following tumor size changes are is not sufficient to fully characterize tumor modifications. The main goal of this thesis was to use different ultrasound-based imaging modalities in order to assess their sensitivity to modifications induced in murine tumor model (colorectal and lung carcinomas) during different type of therapy (chemical: cytotoxic, antiangiogenic / physical: cold plasma, sonosensitization). Modifications of the spatial distribution of microvessels and their functionality were characterized using contrast-enhanced ultrasound (CEUS), alteration of tumor microstructure was assessed using spectral analysis of radiofrequency signal, known as quantitative ultrasound (QUS) and finally variations of mechanical properties in tumor tissues were measured in shear wave elastography (SWE). In order to better understand the origin of the modifications observed in vivo, standard parameters such as level of fibrosis and necrosis were characterize ex vivo in tumor tissue using immunochemistry as gold standard

3

Guan, Guangying. "Micro-motion detection by optical coherence tomography (OCT) and its clinical applications". Thesis, University of Dundee, 2015. https://discovery.dundee.ac.uk/en/studentTheses/f2ac8e9f-aee4-4e70-9c79-de7de35fae43.

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Abstract (sommario):

Detection of micro-motion on biological tissues has various applications such as ultrasound elastography and magnetic resonance elastography (MRE). Ultrasound transducers, the most commonly used tool to detect endogenous and exogenous micro-motions, have a number of drawbacks: including the requirements of the physical contact with the sample and limited spatial resolution (millimetre scale). The aim of this thesis is to develop a non-contact phase-sensitive imaging technique which is suitable for functional imaging in the micron range which also has the potential for quantitative analysis of relative properties resulting from an appropriate image processing. Concerning imaging techniques, this thesis focused on optical coherence tomography (OCT) and in particular on phase-sensitive optical coherence tomography (PhS-OCT). In this thesis, a PhS-OCT system is developed for micro-motion detection and a dual camera PhS-OCT system is developed to double the imaging acquiring speed and improve the sensitivity to small phase change. Two applications of PhS-OCT combining micro-motions detection are preformed: 1) Photo-thermal OCT (PT-OCT) system is developed to detect the photo-thermal phenomenon of nanoparticles. A mathematic model is proposed to analyse and reconstruct the distribution of nanoparticles in biological tissues. 2) A quantitative 3D optical coherence elastography (OCE) system and algorithm are developed to analysis the mechanical property of tissue. A feasibility study is carried for the diagnosis of prostate cancer (PCa) using this technique. Results show that PhS-OCT is a powerful tool for the detection of micro-motions (micron range). Functional OCT based on it such as PT-OCT and OCE offers potential in diagnostic and therapeutic in clinical applications, e.g. PT-OCT can be used to detect and map the distribution and concentration of dye and drug in tissues or organs. 3D OCE can provide useful information for early localization and diagnosis of cancer.

Capitoli di libri sul tema "Micro-elastography":

1

Suzuki, Hayato, Mikio Suga, Kazuhiro Fujisaki, Itsuro Kajiwara, Gen Nakamura, Kogo Yoshikawa e Shigeru Tadano. "Viscoelastic Properties of Gel Material and Soft Tissue Measured by MRE (Magnetic Resonance Elastography) Using Micro MRE". In IFMBE Proceedings, 156–59. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-02913-9_40.

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2

Yamamoto, Takao. "Rheological Basis of Magnetic Resonance Elastography". In Nano/Micro Science and Technology in Biorheology, 157–81. Tokyo: Springer Japan, 2015. http://dx.doi.org/10.1007/978-4-431-54886-7_7.

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3

Okechukwu Erondu, Felix. "Perspective Chapter: Recent Advances in Musculo-Skeletal Ultrasound". In Ultrasound Imaging - Current Topics [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.101338.

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Abstract (sommario):

Medical imaging specialists continue to explore better ways of demonstrating pathology and anatomy of the musculo-skeletal system. The continuous quest is fuelled by the desire to improve diagnostic yield, perform procedures more quickly and accurately, reduce risks to patient or operator, achieve better cost efficiency and utilize less complex methodologies. In many instances, musculoskeletal ultrasound acts as a screening, diagnostic tool but also guide and monitor therapeutic interventions. The paper outlines the use of ultrasound in the imaging of peripheral nerve disorders, traumatic and atraumatic joint disorders, Doppler techniques such as super micro vascular Imaging and sono-elastography. Refinements in probe technology and application of digital and novel proprietary software, have continued to improve the resolution of ultrasound images and with finer details on a scale not previously possible. With increasing experience and standardization of protocols, Musculoskeletal ultrasound will continue to play a great role in the diagnostic work-up and treatment of related disorders.

Atti di convegni sul tema "Micro-elastography":

1

Metzner, Kai L., Qi Fang, Rowan W. Sanderson, Alireza Mowla e Brendan F. Kennedy. "Friction in quantitative micro-elastography". In Optical Coherence Imaging Techniques and Imaging in Scattering Media, a cura di Maciej Wojtkowski, Yoshiaki Yasuno e Benjamin J. Vakoc. SPIE, 2023. http://dx.doi.org/10.1117/12.2669463.

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2

Yakovlev, Vladislav V., Dawson Nodurft, Zachary Coker e Zhaokai Meng. "Brillouin micro-elastography of laser-processed materials". In SPIE LASE, a cura di Bo Gu, Henry Helvajian, Alberto Piqué, Corey M. Dunsky e Jian Liu. SPIE, 2017. http://dx.doi.org/10.1117/12.2252714.

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3

Wang, Shang, e Kirill V. Larin. "Noncontact depth-resolved micro-scale corneal elastography". In SPIE BiOS, a cura di Kirill V. Larin e David D. Sampson. SPIE, 2015. http://dx.doi.org/10.1117/12.2076623.

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4

Hepburn, Matt, Philip Wijesinghe, Luke Major, Lixin Chin, Nicholas Hugenberg, Dawei Song, Assad A. Oberai, Yu Suk Choi e Brendan F. Kennedy. "Quantitative micro-elastography for cell mechanobiology (Conference Presentation)". In Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XXIII, a cura di Joseph A. Izatt e James G. Fujimoto. SPIE, 2019. http://dx.doi.org/10.1117/12.2511486.

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5

Lixin Chin, Andrea Curatolo, Philip Wijesinghe, Kelsey M. Kennedy, Robert A. McLaughlin, Brendan F. Kennedy e David D. Sampson. "Sensitivity and resolution in optical coherence micro-elastography". In 2015 IEEE Photonics Conference (IPC). IEEE, 2015. http://dx.doi.org/10.1109/ipcon.2015.7323503.

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6

Catheline, Stefan, Gabrielle Laloy-Borgna, Ali Zorgani, Bruno Giammarinaro e Pol Grasland-Mongrain. "Complex elastic wave propagation in micro-elastography (Conference Presentation)". In Optical Elastography and Tissue Biomechanics VII, a cura di Kirill V. Larin e Giuliano Scarcelli. SPIE, 2020. http://dx.doi.org/10.1117/12.2551486.

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7

Fang, Qi, Luke Frewer, Renate Zilkens, Lixin Chin, Ken Y. Foo, Rowan Sanderson, Devina Lakhiani et al. "Comparison between two handheld quantitative micro elastography methods (Conference Presentation)". In Optical Elastography and Tissue Biomechanics VII, a cura di Kirill V. Larin e Giuliano Scarcelli. SPIE, 2020. http://dx.doi.org/10.1117/12.2549443.

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8

Hepburn, Matt, Anna Jaeschke, Alireza Mowla, Chii J. Chan e Brendan F. Kennedy. "Three-dimensional characterization of murine ovary elasticity using quantitative micro-elastography." In Optical Elastography and Tissue Biomechanics XI, a cura di Kirill V. Larin e Giuliano Scarcelli. SPIE, 2024. http://dx.doi.org/10.1117/12.3006718.

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9

Aleef, Tajwar Abrar, Reid Vassallo, Qi Zeng, S. Sara Mahdavi, Brian Wodlinger, Miles Mannas, Peter C. Black e Septimiu E. Salcudean. "Implementation of Shear Wave and Strain Elastography with Micro-Ultrasound". In 2023 IEEE International Ultrasonics Symposium (IUS). IEEE, 2023. http://dx.doi.org/10.1109/ius51837.2023.10306532.

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10

Li, Jiayue, Erin M. Lloyd, Matt S. Hepburn, Alireza Mowla, Yu Suk Choi, Miranda D. Grounds e Brendan F. Kennedy. "Characterizing the elasticity of skeletal muscle using quantitative micro-elastography". In Optical Coherence Imaging Techniques and Imaging in Scattering Media, a cura di Maciej Wojtkowski, Yoshiaki Yasuno e Benjamin J. Vakoc. SPIE, 2021. http://dx.doi.org/10.1117/12.2616056.

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