Utilize este identificador para referenciar este registo: https://hdl.handle.net/1822/44183

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Campo DCValorIdioma
dc.contributor.authorGuise, Catarinapor
dc.contributor.authorFernandes, Margarida M.por
dc.contributor.authorNóbrega, J. M.por
dc.contributor.authorPathak, Sudhirpor
dc.contributor.authorSchneider, Walterpor
dc.contributor.authorFangueiro, Raúlpor
dc.date.accessioned2017-01-06T11:19:36Z-
dc.date.issued2016-
dc.identifier.issn1944-8244por
dc.identifier.urihttps://hdl.handle.net/1822/44183-
dc.description.abstractCurrent brain imaging methods largely fail to provide detailed information about the location and severity of axonal injuries and do not anticipate recovery of the patients with traumatic brain injury. High-definition fiber tractography appears as a novel imaging modality based on water motion in the brain that allows for direct visualization and quantification of the degree of axons damage, thus predicting the functional deficits due to traumatic axonal injury and loss of cortical projections. This neuroimaging modality still faces major challenges because it lacks a “gold standard” for the technique validation and respective quality control. The present work aims to study the potential of hollow polypropylene yarns to mimic human white matter axons and construct a brain phantom for the calibration and validation of brain diffusion techniques based on magnetic resonance imaging, including high-definition fiber tractography imaging. Hollow multifilament polypropylene yarns were produced by melt-spinning process and characterized in terms of their physicochemical properties. Scanning electronic microscopy images of the filaments cross section has shown an inner diameter of approximately 12 μm, confirming their appropriateness to mimic the brain axons. The chemical purity of polypropylene yarns as well as the interaction between the water and the filament surface, important properties for predicting water behavior and diffusion inside the yarns, were also evaluated. Restricted and hindered water diffusion was confirmed by fluorescence microscopy. Finally, the yarns were magnetic resonance imaging scanned and analyzed using high-definition fiber tractography, revealing an excellent choice of these hollow polypropylene structures for simulation of the white matter brain axons and their suitability for constructing an accurate brain phantom.por
dc.description.sponsorshipPortuguese Foundation for Science and Technology (FCT) - PhD grant SFRH/BD/90324/2012por
dc.language.isoengpor
dc.publisherAmerican Chemical Societypor
dc.relationinfo:eu-repo/grantAgreement/FCT/SFRH/SFRH%2FBD%2F90324%2F2012/PTpor
dc.rightsclosedAccesspor
dc.subjectHollow multifilament yarnspor
dc.subjectPolypropylenepor
dc.subjectBrain phantompor
dc.subjectHigh-definition fiber tractographypor
dc.subjectWater diffusionpor
dc.titleHollow polypropylene yarns as a biomimetic brain phantom for the validation of high-definition fiber tractography imagingpor
dc.typearticlepor
dc.peerreviewedyespor
sdum.publicationstatusinfo:eu-repo/semantics/publishedVersionpor
oaire.citationStartPage29960por
oaire.citationEndPage29967por
oaire.citationIssue44por
oaire.citationTitleACS Applied Materials and Interfacespor
oaire.citationVolume8por
dc.identifier.eissn1944-8252por
dc.identifier.doi10.1021/acsami.6b09809por
dc.identifier.pmid27723307por
dc.subject.fosEngenharia e Tecnologia::Engenharia dos Materiaispor
dc.subject.wosScience & Technologypor
sdum.journalACS Applied Materials and Interfacespor
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