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Artykuły w czasopismach na temat "Contenu en myéline"
Mournet, S., G. Okubo, I. Koubiyr, C. Bal, B. Zhang, H. Kusahara, V. H. Prevost i in. "L’IRM de diffusion hautes valeurs de b améliore l’évaluation du contenu cortical en myéline". Journal of Neuroradiology 47, nr 2 (marzec 2020): 81–82. http://dx.doi.org/10.1016/j.neurad.2019.12.005.
Pełny tekst źródłaGrosbois, B., JY Mary, JL Michaux, P. Jégo, JP Pollet, I. Azaïs, P. Goupille, JF Bernard, P. Philippe i M. Monconduit. "Comparaison de l'association melphalan séquentiel ou continu, interféron alpha-2a et prednisone dans le traitement du myélome multiple". La Revue de Médecine Interne 15 (styczeń 1994): 75s. http://dx.doi.org/10.1016/s0248-8663(05)82607-4.
Pełny tekst źródłaCANET, Emmanuel, Soraya Benguerfi i Théophile Lancrey-Javal. "Insuffisance rénale aiguë chez le patient d'onco-hématologie admis en réanimation". Médecine Intensive Réanimation, 7.03.2025. https://doi.org/10.37051/mir-34-002097.
Pełny tekst źródłaRozprawy doktorskie na temat "Contenu en myéline"
Yazdan, Panah Arya. "Integrating imaging biomarkers and genetic data to explore the pathophysiology of multiple sclerosis". Electronic Thesis or Diss., Sorbonne université, 2025. http://www.theses.fr/2025SORUS030.
Pełny tekst źródłaMultiple sclerosis (MS) is a chronic, inflammatory, and neurodegenerative disease of the central nervous system, marked by demyelination and damage to neural pathways in the brain and spinal cord. While significant advancements have been made in treating the autoimmune aspect of MS, addressing the neurodegenerative component remains a critical challenge. This thesis focuses on developing new biomarkers to explore the pathophysiology of MS, aiming to deepen our understanding of disease mechanisms and support the development of therapeutic strategies. To achieve this, we investigate three key biomarkers: (1) myelin content and (2) cerebral blood flow (CBF), both assessed using positron emission tomography (PET), and (3) choroid plexus (CP) volume, a potential proxy for neuroinflammation, quantified through MRI. PET imaging allows precise quantification of myelin and CBF in the white matter, overcoming the limitations of conventional MRI in predicting disability progression. A test-retest study was conducted with dynamic [11C]PiB PET to assess reproducibility in measuring these metrics, and to identify reliable biomarkers that can be used in clinical applications. The second axis of the thesis explores deep learning techniques to automatically segment and control the quality of CP volume measurements on T1-weighted MRI. The CPs, involved in neuroinflammatory responses, offer a promising biomarker for MS across different disease stages. By creating a robust, reproducible segmentation framework, this work enhances our ability to quantify CP volume changes accurately, providing insight into neuroinflammation associated with MS progression. Finally, the genetic architecture of CP volume is examined, focusing on the heritability of this phenotype and identifying genomic loci that may be associated with it. This research pinpoints significant loci linked to CP volume by using genome-wide association studies (GWAS) on MRI-derived phenotypes from the UK Biobank. Advanced genetic mapping techniques, polygenic risk scores, and LD score regression were employed to assess the genetic correlation of CP volume with other traits, offering a comprehensive view of the genetic factors influencing CP variability. In conclusion, this thesis represents an integrative approach to developing imaging and genomic biomarkers for exploring the pathophysiology of MS. By combining PET and MRI with advanced genetic analyses, it provides a multidimensional perspective on MS, identifying potential mechanisms underlying neurodegeneration and neuroinflammation. This integrative framework supports the development of targeted biomarkers that could improve diagnosis, monitoring, and therapeutic interventions
Turcotte, Raphaël. "Optical molecular structural imaging of myelin in a multiple sclerosis context : polarization dependence coherent anti-Stokes Raman scattering microscopy". Master's thesis, Université Laval, 2011. http://hdl.handle.net/20.500.11794/23879.
Pełny tekst źródłaBeing able to visualize new pathogenic features is a gold standard in the biological imag- ing community. The principal goal of this master’s project is to develop a new optical microscopy modality capable of characterizing myelin molecular structural integrity in vivo. This tool is to be used in multiple sclerosis research. Using the polarization de- pendence of coherent anti-Stokes Raman scattering (CARS), we were able to quantify the degree of myelin ordering. Mapping this ordering for every pixels in an image results in molecular structural imaging. Optical molecular structural imaging is, to some ex- tent, similar to electron microscopy, but has the distinct advantage that it can be used on thick and live tissue which provides better context. The index describing myelin ordering is the amplitude modulation. After a full analysis of the amplitude modula- tion, myelin molecular structural imaging was used to study the EAE animal model of multiple sclerosis. A new type of focal myelin membrane disruption was identified. No other existing technique can describe the myelin molecular structure at such a large scale and in live biological tissue. Myelin molecular imaging was also applied to study the spinal cord development in zebrafish. We were able to quantitatively describe a fine but nonetheless generalized reorganization of the myelin sheath through early stages of development although no microscopic morphological changes were apparent. This capacity of observing subtle myelin modification will certainly reveal itself useful in the monitoring of remyelination.