An X-ray beam tracking approach to retrieve directional information in biologica...
An X-ray beam tracking approach to retrieve directional information in biological specimens
The analysis of the directionality of fibres forming the white matter is a fundamental task in the investigation of the nervous system (NS), in terms of understanding its development and ageing as well as many neurological conditi...
The analysis of the directionality of fibres forming the white matter is a fundamental task in the investigation of the nervous system (NS), in terms of understanding its development and ageing as well as many neurological conditions. The imaging of white matter directionality is usually accomplished by means of diffusion tensor magnetic resonance imaging (DTI), which exploits the anisotropic diffusion of water molecules in the NS parenchyma. While DTI meets all the requirements for clinical imaging, it suffers from low resolution, which makes it difficult for pre-clinical small animal imaging where high resolution is required. In addition, it cannot be used for the imaging of materials where no water is present, requiring an alternative technique. In both cases, this can be represented by X-rays, which provide high resolution as well as the capability to extract directional information. However conventional, attenuation-based imaging is not directional, and the multi-modal capability offered by the new phase contrast techniques must be used. In addition to attenuation, these techniques also provide refraction and ultra-small angle scattering, which are directional signals and can be exploited to retrieve fibre orientation on a multi-scale level, above and below the system’s resolution. In particular, the retrieval of directional information from dark-field has been demonstrated by means of grating interferometry, which requires the use of two or three optical elements depending on the source size. The main goal of the project is to introduce a beam tracking (BT) multi-modal technique as an alternative for directional imaging. BT is based on the use of a single mask regardless of the source size, therefore providing the same capabilities as grating interferometry but a significantly simpler and more versatile setup. Directional BT will be used to extract the direction of fibres in sections of murine NS using both synchrotron facilities and laboratory sources.ver más
05-11-2024:
Cataluña Gestión For...
Se abre la línea de ayuda pública: Gestión Forestal Sostenible para Inversiones Forestales Productivas para el organismo:
04-11-2024:
Doctorados industria...
Se ha cerrado la línea de ayuda pública: Formación de doctores y doctoras de las universidades del Sistema universitario de Galicia (SUG) en empresas y centros de innovación y tecnología para el organismo:
04-11-2024:
PERTE-AGRO2
Se ha cerrado la línea de ayuda pública: PERTE del sector agroalimentario
Seleccionando "Aceptar todas las cookies" acepta el uso de cookies para ayudarnos a brindarle una mejor experiencia de usuario y para analizar el uso del sitio web. Al hacer clic en "Ajustar tus preferencias" puede elegir qué cookies permitir. Solo las cookies esenciales son necesarias para el correcto funcionamiento de nuestro sitio web y no se pueden rechazar.
Cookie settings
Nuestro sitio web almacena cuatro tipos de cookies. En cualquier momento puede elegir qué cookies acepta y cuáles rechaza. Puede obtener más información sobre qué son las cookies y qué tipos de cookies almacenamos en nuestra Política de cookies.
Son necesarias por razones técnicas. Sin ellas, este sitio web podría no funcionar correctamente.
Son necesarias para una funcionalidad específica en el sitio web. Sin ellos, algunas características pueden estar deshabilitadas.
Nos permite analizar el uso del sitio web y mejorar la experiencia del visitante.
Nos permite personalizar su experiencia y enviarle contenido y ofertas relevantes, en este sitio web y en otros sitios web.