Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/52841

TitleProcessing time reduction: an application in living human high-resolution diffusion magnetic resonance imaging data
Author(s)Lori, Nicolas Francisco
Ibañez, Augustin
Lavrador, Rui
Fonseca, Lucia
Santos, Carlos
Travasso, Rui
Pereira, Artur
Rossetti, Rosaldo
Sousa, Nuno
Alves, Victor
KeywordsAxonal ODF
Diffusion MRI
Monte Carlo sampling methods
Optimization
White matter
Issue dateNov-2016
PublisherSpringer
JournalJournal of Medical Systems
Abstract(s)High Angular Resolution Diffusion Imaging (HARDI) is a type of brain imaging that collects a very large amount of data, and if many subjects are considered then it amounts to a big data framework (e.g., the human connectome project has 20 Terabytes of data). HARDI is also becoming increasingly relevant for clinical settings (e.g., detecting early cerebral ischemic changes in acute stroke, and in pre-clinical assessment of white matter-WM anatomy using tractography). Thus, this method is becoming a routine assessment in clinical settings. In such settings, the computation time is critical, and finding forms of reducing the processing time in high computation processes such as Diffusion Spectrum Imaging (DSI), a form of HARDI data, is very relevant to increase data-processing speed. Here we analyze a method for reducing the computation time of the dMRI-based axonal orientation distribution function h by using Monte Carlo sampling-based methods for voxel selection. Results evidenced a robust reduction in required data sampling of about 50 % without losing signal’s quality. Moreover, we show that the convergence to the correct value in this type of Monte Carlo HARDI/DSI data-processing has a linear improvement in data-processing speed of the ODF determination. Although further improvements are needed, our results represent a promissory step for future processing time reduction in big data.
TypeArticle
DescriptionUm errata deste artigo encontra-se disponível em: http://hdl.handle.net/1822/52993
URIhttp://hdl.handle.net/1822/52841
DOI10.1007/s10916-016-0594-2
ISSN0148-5598
e-ISSN1573-689X
Publisher versionhttps://link.springer.com/journal/10916
Peer-Reviewedyes
AccessRestricted access (UMinho)
Appears in Collections:CAlg - Artigos em revistas internacionais/Papers in international journals

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