Papers by Jeanne Baldisser
Acta acustica, 2022
Low-intensity ultrasound stimulation is a technique used in therapeutic ultrasound for bone regen... more Low-intensity ultrasound stimulation is a technique used in therapeutic ultrasound for bone regeneration. However, the underlying mechanisms are still poorly understood. In vitro studies on cell cultures are implemented to understand the processes involved. To analyze the effects of ultrasonic waves on cells, the control of the delivered acoustic intensity is essential. However, depending on the insonification protocol chosen, multiple reflections and standing waves that form inside the culture medium strongly hinder the estimates. In this work, we propose the development and the experimental validation of an anti-reflection cover. We demonstrate that this custom-designed device is effective in avoiding multiple reflections and makes it possible to artificially replace the layer of culture medium with a large amount of water. Finally, an analytical study of the acoustic intensity delivered to the cells is proposed.
HAL (Le Centre pour la Communication Scientifique Directe), Apr 11, 2022
Ultrasound Computed Tomography using linear inversion methods fail to provide high resolution bon... more Ultrasound Computed Tomography using linear inversion methods fail to provide high resolution bone images. For children thin bone imaging, acquisition steps must be as fast as possible with a short-time exposure and low-intensity sonication. We have developed a fast-acquisition setup based on a cylindrical-focusing ring antenna, and a fast-protocol using Born approximation and spatial Fourier transform. But the result is still poor contrast-to-noise ratio (CNR) image. This work is concerning the improvement of CNR using a wavelet-based adapted method. Results will be presented and discussed on newborn arm phantoms and ex vivo complete organ.
HAL (Le Centre pour la Communication Scientifique Directe), Apr 11, 2022
HAL (Le Centre pour la Communication Scientifique Directe), Apr 11, 2022
HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific re... more HAL is a multidisciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés.
Le Centre pour la Communication Scientifique Directe - HAL - Aix-Marseille Université, Apr 11, 2022
Le Centre pour la Communication Scientifique Directe - HAL - Aix-Marseille Université, Apr 11, 2022
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Papers by Jeanne Baldisser