Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Francois Guy Gerard Marie Vignon"'
Autor:
Jean-Luc Robert, Iason Zacharias Apostolakis, Ali Sadeghi, Francois Guy Gerard Marie Vignon, Can Meral, Junseob Shin
Publikováno v:
2021 IEEE International Ultrasonics Symposium (IUS).
Harmonic imaging is used as default in many ultrasound imaging settings due to its advantages in contrast and resolution compared to fundamental imaging. However, the nonlinear harmonic generation process and higher imaging frequencies induce a stron
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cbf1e1c97e31242517a74d9a1ef7d943
https://doi.org/10.1109/ius52206.2021.9593665
https://doi.org/10.1109/ius52206.2021.9593665
Resolution Improvement with a Fully Convolutional Neural Network Applied to Aligned Per-Channel data
Autor:
Iason Zacharias Apostolakis, Jean-Luc Robert, Sheng-Wen Huang, Faik Can Meral, Francois Guy Gerard Marie Vignon, Junseob Shin
Publikováno v:
2020 IEEE International Ultrasonics Symposium (IUS).
The lateral resolution of ultrasound images is determined by the size of the imaging aperture. Computational techniques have been proposed to improve resolution beyond the diffraction limit (Minimum Variance and Compressive Beamforming), but they lac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1054f5cb3b7b64633bb6f5ace5b4b0b8
https://doi.org/10.1109/ius46767.2020.9251482
https://doi.org/10.1109/ius46767.2020.9251482
Autor:
Jean-Luc Robert, Iason Zacharias Apostolakis, Francois Guy Gerard Marie Vignon, Junseob Shin, Ali Sadeghi, Can Meral
Publikováno v:
2020 IEEE International Ultrasonics Symposium (IUS).
Ultrasound (US) image quality often suffers from random and speckle noise. Especially in the case of difficult patients, increased presence of random noise leads to compromised signal to noise ratio (SNR). The proposed technique removes random or spe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::747911484f34d78b9f78fa392b604527
https://doi.org/10.1109/ius46767.2020.9251578
https://doi.org/10.1109/ius46767.2020.9251578
Autor:
Jason Yu, Junseob Shin, Faik Can Meral, Jean-Luc Robert, Francois Guy Gerard Marie Vignon, Ali Sadeghi, Iason Zacharias Apostolakis
Publikováno v:
2020 IEEE International Ultrasonics Symposium (IUS).
The Wiener postfilter [1] was introduced to ultrasound by Nilsen and Holm as a weighting mask designed to minimize the mean squared error (MSE) between the weighted noisy beamformed signal and the true noiseless signal [2]. Its application requires e
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f59645265cb0946d1db09c4fca0cd060
https://doi.org/10.1109/ius46767.2020.9251392
https://doi.org/10.1109/ius46767.2020.9251392
Publikováno v:
2020 IEEE International Ultrasonics Symposium (IUS).
Left ventricular (LV) filling following atrial kick in late diastole generates LV myocardial stretch that propagates with a speed related to myocardial stiffness. Changes in myocardial stiffness have shown to be related to cardiac disease. Therefore,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::89b33ef8954ec6631a1211c2eb5c72ac
https://doi.org/10.1109/ius46767.2020.9251722
https://doi.org/10.1109/ius46767.2020.9251722
Autor:
Iason Zacharias Apostolakis, Can Meral, Bo Zhang, Guillaume David, Francois Guy Gerard Marie Vignon, Jean-Luc Robert
Publikováno v:
2020 IEEE International Ultrasonics Symposium (IUS).
Compressive Beamforming uses a beamforming matrix in conjunction with a sparsity prior to form high quality ultrasound images from a single or few insonifications. In some cases, due to poor SNR or model mismatch, it is desirable to use a larger numb
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9986d9bed2ed8d2ad08326c405d1b034
https://doi.org/10.1109/ius46767.2020.9251848
https://doi.org/10.1109/ius46767.2020.9251848
Autor:
Jeffry E. Powers, William T. Shi, John Lof, Francois Guy Gerard Marie Vignon, Matthew L. White, Feng Xie, Thomas R. Porter
Publikováno v:
Investigative Radiology. 52:477-481
Background Acute ischemic stroke is often due to thromboembolism forming over ruptured atherosclerotic plaque in the carotid artery (CA). The presence of intraluminal CA thrombus is associated with a high risk of thromboembolic cerebral ischemic even
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd4ff9d78c30b86b5893cfbb13b281d3
https://doi.org/10.1097/rli.0000000000000369
https://doi.org/10.1097/rli.0000000000000369
Publikováno v:
2019 IEEE International Ultrasonics Symposium (IUS).
Plane wave imaging (PWI) and diverging wave imaging (DWI) can achieve high frame rate by coherently compounding beamsum data from broad transmit beams at different angles. However, many transmits are still needed as image quality degradation occurs w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2593ef71fa735e28355cd883b1ae198d
https://doi.org/10.1109/ultsym.2019.8925998
https://doi.org/10.1109/ultsym.2019.8925998
Autor:
Jean-Luc Robert, Can Meral, Junseob Shin, Iason Zacharias Apostolakis, Francois Guy Gerard Marie Vignon
Publikováno v:
2019 IEEE International Ultrasonics Symposium (IUS).
One of the issues affecting motion compensation schemes in ultrasound imaging is sidelobe re-alignment, a cause of potentially significant image degradation. In this study, we propose a method to address this problem based on tracking the motion betw
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bfd8a178985dad949a50ea78ca7b7d4f
https://doi.org/10.1109/ultsym.2019.8926216
https://doi.org/10.1109/ultsym.2019.8926216
Autor:
Sheng-Wen Huang, Jean-Luc Robert, Nguyen Man, Junseob Shin, Francois Guy Gerard Marie Vignon, Fernando Quivira, Iason Zacharias Apostolakis, Can Meral, Sivley Roy A
Publikováno v:
2019 IEEE International Ultrasonics Symposium (IUS).
Cardiac ultrasound imaging suffers from acoustic artefacts including diffraction limitation, aberration, reverberation, multipath, and electronic noise. In particular, multipath through the chest wall gives rise to a diffuse haze that obscures clinic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aae8a4f4b0eac616c21e8624fcc1cceb
https://doi.org/10.1109/ultsym.2019.8925646
https://doi.org/10.1109/ultsym.2019.8925646