Academic literature on the topic 'Imagerie par ultrasons en 3D'
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Journal articles on the topic "Imagerie par ultrasons en 3D"
Auriol, J., O. Cosin, S. Lagarde, P. Otal, H. Rousseau, and F. Joffre. "RI-WS-14 Imagerie rotationnelle et 3D par capteur plan en radiologie vasculaire et interventionnelle." Journal de Radiologie 88, no. 10 (October 2007): 1586. http://dx.doi.org/10.1016/s0221-0363(07)81936-6.
Full textAthanasiou, A., and A. Tardivon. "Élastographie par ultrasons en imagerie cancérologique." Oncologie 12, no. 3 (March 2010): 208–12. http://dx.doi.org/10.1007/s10269-010-1872-4.
Full textChiou, Auguste, André Mermoud, and Serge-Emmanuel Hédiguer. "Glaucome malin par blocage ciliaire après sclérectomie profonde - Imagerie par biomicroscope à ultrasons*." Klinische Monatsblätter für Augenheilkunde 208, no. 05 (May 1996): 279–81. http://dx.doi.org/10.1055/s-2008-1035214.
Full textAuger, F., S. Willoteaux, C. Lions, Z. Negaiwi, L. Gengler, M. Midulla, K. Akkari, and J. P. Beregi. "Imagerie par résonance magnétique des artères coronaires : acquisition « cœur entier », en respiration libre, sans injection d’agent de contraste et utilisant la séquence 3D en écho de gradient balancé ultrarapide." Journal de Radiologie 91, no. 1 (January 2010): 78–81. http://dx.doi.org/10.1016/s0221-0363(10)70012-3.
Full textBrulé, A., L. Matignon, N. Elie, J. Vigouroux, A. Roche, N. Lassau, and P. Péronneau. "Acquisition 3D temps reel et quantification 3D de la perfusion tumorale par ultrasons." Journal de Radiologie 87, no. 10 (October 2006): 1422. http://dx.doi.org/10.1016/s0221-0363(06)87456-1.
Full textBrulé, A., L. Matignon, N. Elie, J. Vigouroux, A. Roche, N. Lassau, and P. Péronneau. "RECH2 Acquisition 3D temps reel et quantification 3D de la perfusion tumorale par ultrasons." Journal de Radiologie 87, no. 10 (October 2006): 1552. http://dx.doi.org/10.1016/s0221-0363(06)87956-4.
Full textMonfort, Tual, Salvatore Azzollini, Nathaniel Norberg, Olivier Thouvenin, and Kate Grieve. "Imagerie 3D en direct : la tomographie par cohérence optique dynamique." Photoniques, no. 127 (2024): 32–36. http://dx.doi.org/10.1051/photon/202412737.
Full textRomanowicz, Barbara. "Imagerie globale de la Terre par les ondes sismiques." Reflets de la physique, no. 56 (January 2018): 4–9. http://dx.doi.org/10.1051/refdp/201856004.
Full textChédotal, A. "Imagerie 3D par microscopie à feuille de lumière, applications à l’Endocrinologie." Annales d'Endocrinologie 83, no. 5 (October 2022): 278. http://dx.doi.org/10.1016/j.ando.2022.07.023.
Full textBassil-Nassif, Nayla, Joseph Bouserhal, Jacques Treil, José Braga, and Robert Garcia. "Dimorphisme sexuel et cavités faciales : étude volumétrique en imagerie 3D." L'Orthodontie Française 82, no. 2 (June 2011): 217–22. http://dx.doi.org/10.1051/orthodfr/2011116.
Full textDissertations / Theses on the topic "Imagerie par ultrasons en 3D"
Tamraoui, Mohamed. "Sparse array 3D ultrasound imaging." Electronic Thesis or Diss., Lyon 1, 2024. https://theses.hal.science/tel-04828515.
Full textSparse arrays present several notable advantages over other element reduction techniques for 3D ultrasound imaging. One of the most promising benefits is their ability to freely steer the ultrasound beam in all directions, which significantly enlarges the field of view. This capability opens up possibilities for implementing advanced imaging sequences, such as diverging waves, which are particularly beneficial for applications like echocardiography. Additionally, sparse arrays use fewer elements, reducing the complexity and cost of manufacturing and operating the transducer arrays. This reduction in hardware can also simplify the system design and decrease power consumption. Despite their advantages, sparse arrays face two significant challenges: low sensitivity and reduced image contrast. The primary objectives of this thesis are twofold: first, to increase the signal-to-noise ratio (SNR) of sparse arrays; second, to enhance image contrast. This research is part of the ANR (Agence National de la Recherche) Project named SPARse array TECHniques FOR 3D medical UltraSound (SPARTECHUS). SPARTECHUS is a collaborative project between our laboratory, CREATIS, and Imasonic, an ultrasound transducer manufacturer, with the aim of developing the next generation of ultrasound arrays 3D ultrasound imaging. By hypothesizing that transducer elements with higher sensitivity and equivalent directivity can be developed, Imasonic focused on developing a new prototype of a sparse array. My contribution consisted of combining their technology with coded excitation sequences, with the goal of improving the SNR. Then, to address the problem of poor image contrast due to high sidelobe levels, I developed a new reconstruction algorithm based on deep learning networks, specifically trained for the new prototype probe. This algorithm will focus on optimizing the beamforming processes to achieve high-quality ultrasound images. Together, these objectives aim to overcome the principal challenges associated with sparse probes, paving the way for their more effective use in 3D ultrasound imaging
Finel, Victor. "3D ultrafast echocardiography : toward a quantitative imaging of the myocardium." Thesis, Sorbonne Paris Cité, 2018. http://www.theses.fr/2018USPCC134/document.
Full textThe objectives of this PhD thesis were to develop 3D ultrafast ultrasound imaging of the human heart toward the characterization of cardiac tissues. In order to do so, a customized, programmable, ultrafast scanner built in our group was used. In the first part of this thesis, a real-time imaging sequence was developed to facilitate in-vivo imaging using this scanner, as well as dedicated 3D and 4D visualization tools. Then, we developed 3D Backscatter Tensor Imaging (BTI), a technique to visualize the muscular fibres orientation within the heart wall non-invasively during the cardiac cycle. Applications on a healthy volunteer before and after cardiac contraction was shown. Moreover, the undesired effects of axial motion on BTI were studied, and a methodology to estimate motion velocity and reduce the undesired affects was introduced and applied on a healthy volunteer. This technique may become an interesting tool for the diagnosis and quantification of fibres disarrays in hypertrophic cardiomyopathies. Moreover, 3D ultrafast ultrasound was used to image the propagation of naturally generated shear waves in the heart walls, and an algorithm to determine their speed was developed. The technique was validated in silico and the in vivo feasibility was shown on two healthy volunteers, during cardiac contraction and relaxation. As the velocity of shear waves is directly related to the rigidity of the heart, this technique could be a way to assess the ability of the ventricle to contract and relax, which is an important parameter for cardiac function evaluation. Finally, the transient myocardial contraction was imaged in 3D on isolated rat hearts at high framerate in order to analyse the contraction sequence. Mechanical activation delays were successfully quantified during natural rhythm, pacing and hypothermia. Then, the feasibility of the technique in 2D on human hearts non-invasively was investigated. Applications on foetuses and adults hearts were shown. This imaging technique may help the characterization of cardiac arrhythmias and thus improve their treatment. In conclusion, we have introduced in this work three novel 3D ultrafast imaging modalities for the quantification of structural and functional myocardial properties. 3D ultrafast imaging may become an important non-ionizing, transportable diagnostic tool that may improve the patient care at the bed side
Follet, Hélène. "Caractérisation biomécanique et modélisation 3D par imagerie X et IRM haute résolution de l'os spongieux humain : évaluation du risque fracturaire." Lyon, INSA, 2002. http://theses.insa-lyon.fr/publication/2002ISAL0105/these.pdf.
Full textTo prevent bone pathology, the aim of this study is to test a new methodology to evaluate fracture risk of human calcaneus cancellous bone. By using i) clinical data (bone mineral density, microstructure, DXA, Scanner X, Histomorphometry) and ii) high definition imaging techniques (RMN at 78 µm and µComputed Tomography at 10µm), it will be possible to estimate cancellous bone mechanical properties (Young Modulus and compressive maximal stress). Two tests have been implemented : a compressive test on a cubic sample of cancellous bone, and secondly, a bending test on trabecular bone. Different finite element models of these have been used and allow to determine mechanical properties of trabecular bone. Fracture risk can be evaluated by damage quantification and tissue strain level. Results of this methodology will then be compared with those obtained by classical clinical techniques
Follet, Hélène Rumelhart Claude. "Caractérisation biomécanique et modélisation 3D par imagerie X et IRM haute résolution de l'os spongieux humain évaluation du risque fracturaire /." Villeurbanne : Doc'INSA, 2006. http://docinsa.insa-lyon.fr/these/pont.php?id=follet.
Full textRobin, Justine. "Development of a 3D time reversal cavity for pulsed cavitational ultrasound : application to non-invasive cardiac therapy." Thesis, Sorbonne Paris Cité, 2017. http://www.theses.fr/2017USPCC273/document.
Full textThe objective of this thesis was to explore new applications for cardiac histotripsy, and to develop the tools making it possible non-invasively. Cardiac ultrasound therapy indeed still remains limited due to the tremendous challenge of treating a constantly and rapidly moving organ, well protected behind the ribcage.We first showed in vivo, on a large animal model, that histotripsy could be used non-invasively to cut mitral chordae, and to treat calcified aortic stenosis in a beating heart. Cavitation on the valve leaflets can indeed locally and remotely act on the calcifications, and globally soften the valve. Simultaneously, we developed a therapeutic device allowing completely non-invasive cardiac shock-wave therapy based on the time reversal cavity concept. In particular, this device allows the emission of high intensity ultrasound pulses, and provides 3D electronical steering of the therapy focal spot in a large volume. After a thorough optimisation process, this device was capable of creating well controlled mechanical lesions over a 2 000 cm3 region of interest. To tackle the challenge of ultrasound propagation through the rib cage, we developed an adaptive focusing method (DORT method through a time reversal cavity), and implemented it in a 2D prototype of the device. With this method, we not only could build an adaptive ultrasonic wavefront propagating preferentially through the intercostal spaces, but due to time reversal cavities properties, we could also increase the peak pressure obtained on target.Finally, we pushed our work on adaptive focusing further, and considered the case of transcranial imaging. For this application, we chose to use the time reversal of speckle noise technique, to correct the aberrations induced by the skull. In numerical simulations, we were able to derive the phase and amplitude modulations induced by the bones, and could improve the contrast and resolution of a B-mode image
Sauvage, Jack. "Imagerie ultrasonore ultrarapide 4D par adressage orthogonal du réseau de sonde matricielle : adressage Ligne-Colonne." Thesis, Sorbonne université, 2019. http://www.theses.fr/2019SORUS535.
Full textWith the advent of 4D ultrafast imaging at the Physics for Medicine Inserm 1273 laboratory, the ability to acquire in all three dimensions and with a high spatio-temporal resolution has been demonstrated. Several of the most effective 2D ultrafast imaging modalities have been extended to volume imaging (3D ultrasensitive power Doppler, 3D elastography ...). Their dissemination in clinic would greatly benefit to physicians. However the necessary means to implement ultrafast 4D are still too heavy and costly to hope for a transposition in the short or mid-term to the radiology departments. Developing smart strategies to reduce channel number has become a central issue. An original strategy based on the probe architecture consists of orthogonal row and column addressing of the Matrix Probe array, the Row and Column Adressing RCA. It offers a transducer solution perfectly adapted with ultra-fast plane waves imaging. With this approach, the probe can be driven by a single standard ultrasound unit, while maintaining a large aperture. The 2D matrix grid is organized according to N + N orthogonal channels, thus representing a reduction factor of N / 2. This strategy presents an important paradigm shift of imaging by dissociation of the focus pathways in transmission and reception and offers a new compromise in terms of spatio-temporal resolution. During this thesis work, the performances of the RCA associated with the ultra fast 4D imaging are studied for various cases. The principle of 4D ultrafast RCA imaging with orthogonal summation OPW are studied. 3D vector imagery for RCA is developed. A new high frequency RCA probe prototype (15MHz) is presented and tested on a 3D functional brain imaging protocol. Finally, a new modality of 3D imaging of the flux intensity is presented offering a new way of exploitation for the RCA probe
Lorintiu, Oana. "Reconstruction par acquisition compressée en imagerie ultrasonore médicale 3D et Doppler." Thesis, Lyon, INSA, 2015. http://www.theses.fr/2015ISAL0093/document.
Full textThis thesis is dedicated to the application of the novel compressed sensing theory to the acquisition and reconstruction of 3D US images and Doppler signals. In 3D US imaging, one of the major difficulties concerns the number of RF lines that has to be acquired to cover the complete volume. The acquisition of each line takes an incompressible time due to the finite velocity of the ultrasound wave. One possible solution for increasing the frame rate consists in reducing the acquisition time by skipping some RF lines. The reconstruction of the missing information in post processing is then a typical application of compressed sensing. Another excellent candidate for this theory is the Doppler duplex imaging that implies alternating two modes of emission, one for B-mode imaging and the other for flow estimation. Regarding 3D imaging, we propose a compressed sensing framework using learned overcomplete dictionaries. Such dictionaries allow for much sparser representations of the signals since they are optimized for a particular class of images such as US images.We also focus on the measurement sensing setup and propose a line-wise sampling of entire RF lines which allows to decrease the amount of data and is feasible in a relatively simple setting of the 3D US equipment. The algorithm was validated on 3D simulated and experimental data. For the Doppler application, we proposed a CS based framework for randomly interleaving Doppler and US emissions. The proposed method reconstructs the Doppler signal using a block sparse Bayesian learning algorithm that exploits the correlation structure within a signal and has the ability of recovering partially sparse signals as long as they are correlated. This method is validated on simulated and experimental Doppler data
Follet, Hélène. "Caractérisation Biomécanique et Modélisation 3D par Imagerie X et IRM haute résolution de l'os spongieux humain : Evaluation du risque fracturaire." Phd thesis, INSA de Lyon, 2002. http://tel.archives-ouvertes.fr/tel-00003145.
Full textSivadon, Audrey. "Contributions à l’imagerie passive de la cavitation ultrasonore : formation de voies adaptatives en 3D et extension spatiale de nuages de bulles." Electronic Thesis or Diss., Lyon 1, 2022. http://www.theses.fr/2022LYO10172.
Full textPassive imaging relies on beamforming algorithms that require large aperture probes to provide good axial resolutions; however, in 3D passive imaging, the matrix probes currently marketed do not meet this constraint. Moreover, these probes have a large number of elements, which makes their use particularly unwieldy. This thesis work focuses on the study and improvement of passive cavitation imaging by addressing two aspects in particular: (i) the practical and efficient implementation of 3D passive imaging, (ii) the problem of imaging large sources such as cavitation clouds. We have combined the application of sparse methods (to reduce the number of active elements of the probe used) and the transposition from 2D to 3D of adaptive algorithms in the frequency domain. This formalism uses the robust estimation of the inter-spectral density matrix (CSM) and allowed us to implement simply and efficiently different algorithms: Delay-And-Sum (DAS), Robust-Capon-Beamformer and Pisarenko. The efficiency of these algorithms in 3D has been tested in terms of width to half height, contrast and position error, on a point source in simulations and on a point reflector in experiments. Finally, in order to address the reality of cavitation clouds, we have investigated the behavior of these reconstruction methods in the case of extended sources. Our 2D simulations show the evolution of the reconstructed images as a function of the cavitation cloud characteristics. This work provides a concrete solution for a simple implementation of 3D passive imaging as well as answers to the expectations on the localization and characterization of a cavitation cloud
Daunizeau, Loïc. "Développement de la thérapie ultrasonore conformationnelle par voie interstitielle pour le traitement du carcinome hépatocellulaire." Electronic Thesis or Diss., Lyon, 2020. http://www.theses.fr/2020LYSE1326.
Full textHepatocellular carcinoma is the most common primary cancer of the liver. Interstitial thermal ablation procedures constitute a type of curative treatments for this cancer. Given the physical nature of the phenomenon used to modify temperature (radio frequency, micro wave, laser, cryotherapy), those methods may not be able to generate a conformal treatment for a given tumor shape. In some cases, this limitation may induce the thermal ablation of a large volume of non-tumor tissues. The use of an ultrasound interstitial probe mounted with a multi-element transducer capable of generating high intensity focused ultrasound (HIFU) may theoretically help to overcome this limitation. Also a transducer with an important number of elements may also provide in situ imaging. As a first step, the design of a transducer for interstitial ultrasound probe was studied. A specific configuration has been proposed for the treatment of tumors with a diameter of 4 cm. The question of the treatment planning method to adopt to reach an optimal conformal treatment has been then addressed by comparing numerical simulations of different strategies. All strategies were sufficiently conformal and none presented real assets compared to the others. Ultrasound focusing in itself provided the desired conformal thermal ablation. Finally, a robotic platform was developed for driving interstitial dual mode ultrasound probes, both in imaging and in therapy mode. This platform allowed the automatic treatment planning of in vitro tumor mimic phantoms, based on 3D ultrasound reconstruction from the B mode images obtained in situ by the interstitial probe. However, in therapy mode, the probes did not reach their specifications and did not manage to create thermal lesions in in vitro liver tissue sample. The modularity of the robotic platform allowed driving a different HIFU system, which was more robust. With this system, the platform managed to perform with success an automatic treatment planning and then the associated HIFU treatment in in vitro tissue sample
Books on the topic "Imagerie par ultrasons en 3D"
Couwenbergh, Jean-Pierre. 3DS Max 8: Guide de re fe rence. Paris: Eyrolles, 2006.
Find full textservice), ScienceDirect (Online, ed. 3D automotive modeling: An insider's guide to 3D car modeling and design for games and film. Boston: Focal Press, 2010.
Find full textKevin, Ring, ed. 3D engine design for virtual globes. Boca Raton, FL: CRC Press, 2011.
Find full textHandbook Of 3d Machine Vision Optical Metrology And Imaging. Taylor & Francis Inc, 2013.
Find full text3D motion graphics for 2D artists: Conquering the 3rd dimension. Waltham, MA: Focal Press, 2012.
Find full text3d Automotive Modeling: An Insider's Guide to 3d Car Modeling and Design for Games and Film. CRC Press LLC, 2012.
Find full textGahan, Andrew. 3D Automotive Modeling: An Insider's Guide to 3D Car Modeling and Design for Games and Film. Taylor & Francis Group, 2017.
Find full text3d Automotive Modeling: An Insider's Guide to 3d Car Modeling and Design for Games and Film. CRC Press LLC, 2012.
Find full text3d Automotive Modeling: An Insider's Guide to 3d Car Modeling and Design for Games and Film. CRC Press LLC, 2012.
Find full text3d Automotive Modeling: An Insider's Guide to 3d Car Modeling and Design for Games and Film. CRC Press LLC, 2012.
Find full textConference papers on the topic "Imagerie par ultrasons en 3D"
Lefort, Claire, Mathieu Chalvidal, Alexis Parenté, Véronique BLANQUET, Henri Massias, Laetitia MAGNOL, and Emilie Chouzenoux. "Imagerie 3D par microscopie multiphotonique appliquée aux sciences du vivant : la chaine instrumentale et computationnelle FAMOUS." In Les journées de l'interdisciplinarité 2022. Limoges: Université de Limoges, 2022. http://dx.doi.org/10.25965/lji.221.
Full textBirkedal, Knut Arne, Harish Datir, and Tianhua Zhang. "A Method to Identify Vertical Reservoir Pressure Communication by Combining Borehole Sonic and High-Frequency Electrical Imaging Data." In 2023 SPWLA 64th Annual Symposium. Society of Petrophysicists and Well Log Analysts, 2023. http://dx.doi.org/10.30632/spwla-2023-0013.
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