MRI- γ Detector Hybrid System

dc.contributor.advisorLuis, Agulles Pedrósspa
dc.contributor.advisorLopéz, Jairo Alexisspa
dc.contributor.authorAbril Fajardo, Andrea Johanaspa
dc.date.accessioned2020-09-09T14:45:45Zspa
dc.date.available2020-09-09T14:45:45Zspa
dc.date.issued2017-12-20spa
dc.description.abstractThe medical imaging field can be divided in 2 imaging modalities: those generating the imaging information from outside the body (basically all x-ray combinations) and ones sending the image information from inside the body (nuclear medicine, US and MRI). The advantage of the latest is that they are able to give functional information (better contrast), however they lack of image resolution compared with CT, for example. The combination of resolution and functional information can be found in hybrid equipment like PET/CT, widely extended commercially. Recent advances in MRI have achieved spatial resolution close those possible with CT, while maintaining superior contrast and functional information. This has promoted its use as hybrid technique, like PET/MR or SPECT/MR. The handicap of these equipment is the influence of the magnetic field, on the γ detection system, whose solution implies high cost and sophisticated electronics . In the current study, we propose the use of MR implementing a dosimetric gel to obtain the functional image. Then it is possible to adapt the γ detector to any clinical MRI. As a result, a low cost and versatil hybrid MRI-γ detector is presented.spa
dc.description.abstractEl campo de la imagen médica se puede dividir en 2 modalidades: las que generan información desde fuera del cuerpo (básicamente todas las combinaciones de rayos x) y los que envían la información de la imagen desde interior del cuerpo (medicina nuclear, US, PET y la RM). La ventaja de las últimas es que tienen la capacidad de ofrecer información funcional (mejor contraste), sin embargo; carecen de buena resolución de imagen en comparación con la CT, por ejemplo. La combinación de resolución e información funcional se puede encontrar en equipos híbridos como la PET/CT, ampliamente comercializado. Recientemente, el gran avance en RM ha sido lograr una resolución espacial cercana a la del CT, manteniendo el mejor contraste y la información funcional. Esto ha promovido su uso en equipos híbridos como la PET/MR o SPECT/MR. El mayor inconveniente de estos es la influencia del campo magnético en el sistema de detección γ , cuya solución implica altos costos y una electrónica sofisticada. En el presente estudio, se propone utilizar RM adaptando el uso de gel dosimétrico para la obtención de la imagen funcional. De esta manera es posible adaptar cada componente a un equipo de RM clínico como una alternativa versátil y de bajo costo para la obtención de imágenes con información anatómica y funcional.spa
dc.description.degreelevelDoctoradospa
dc.description.projectDesign and development of a low field MRI prototype for nuclear medicinespa
dc.description.sponsorshipCOLCIENCIASspa
dc.format.extent109spa
dc.format.mimetypeapplication/pdfspa
dc.identifier.urihttps://repositorio.unal.edu.co/handle/unal/78427
dc.language.isoengspa
dc.publisher.branchUniversidad Nacional de Colombia - Sede Bogotáspa
dc.publisher.departmentDepartamento de Físicaspa
dc.publisher.programBogotá - Ciencias - Doctorado en Ciencias - Físicaspa
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dc.relation2D dose distribution images of a hybrid low field MRI-γ detectorspa
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dc.rightsDerechos reservados - Universidad Nacional de Colombiaspa
dc.rights.accessrightsinfo:eu-repo/semantics/openAccessspa
dc.rights.licenseAtribución-NoComercial-SinDerivadas 4.0 Internacionalspa
dc.rights.spaAcceso abiertospa
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/spa
dc.subject.ddc530 - Físicaspa
dc.subject.proposalMRIeng
dc.subject.proposalIRMspa
dc.subject.proposalMedical imageeng
dc.subject.proposalImagen médicaspa
dc.subject.proposalImagen híbridaspa
dc.subject.proposalHybrid imageeng
dc.subject.proposalImagen anatómicaspa
dc.subject.proposalAnatomical imageeng
dc.subject.proposalFunctional imageeng
dc.subject.proposalImagen funcionalspa
dc.titleMRI- γ Detector Hybrid Systemspa
dc.typeTrabajo de grado - Doctoradospa
dc.type.coarhttp://purl.org/coar/resource_type/c_db06spa
dc.type.coarversionhttp://purl.org/coar/version/c_ab4af688f83e57aaspa
dc.type.contentTextspa
dc.type.driverinfo:eu-repo/semantics/doctoralThesisspa
dc.type.versioninfo:eu-repo/semantics/acceptedVersionspa
oaire.accessrightshttp://purl.org/coar/access_right/c_abf2spa

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