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Sparse Givens resolution of large system of linear equations: applications to image reconstruction

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Sparse Givens resolution of large system of linear equations: applications to image reconstruction

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dc.contributor.author Rodríguez Álvarez, María José es_ES
dc.contributor.author Sánchez, Filomeno es_ES
dc.contributor.author Soriano Asensi, Antonio es_ES
dc.contributor.author Iborra Carreres, Amadeo es_ES
dc.date.accessioned 2015-11-24T13:29:02Z
dc.date.available 2015-11-24T13:29:02Z
dc.date.issued 2010-10
dc.identifier.issn 0895-7177
dc.identifier.uri http://hdl.handle.net/10251/58006
dc.description.abstract In medicine, computed tomographic images are reconstructed from a large number of measurements of X-ray transmission through the patient (projection data). The mathematical model used to describe a computed tomography device is a large system of linear equations of the form AX=B. In this paper we propose the QR decomposition as a direct method to solve the linear system. QR decomposition can be a large computational procedure. However, once it has been calculated for a specific system, matrices Q and R are stored and used for any acquired projection on that system. Implementation of the QR decomposition in order to take more advantage of the sparsity of the system matrix is discussed. es_ES
dc.description.sponsorship This work is partially supported by Generalitat Valenciana GVPRE/2008/303 and the Spanish M.E.C. grant MTM2009-08587. en_EN
dc.language Inglés es_ES
dc.publisher Elsevier es_ES
dc.relation.ispartof Mathematical and Computer Modelling es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject Givens rotations es_ES
dc.subject QR-factorization es_ES
dc.subject Computed tomography es_ES
dc.subject Image reconstruction es_ES
dc.subject.classification MATEMATICA APLICADA es_ES
dc.title Sparse Givens resolution of large system of linear equations: applications to image reconstruction es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.1016/j.mcm.2010.03.016
dc.relation.projectID info:eu-repo/grantAgreement/GVA//GVPRE%2F2008%2F303/ es_ES
dc.relation.projectID info:eu-repo/grantAgreement/MICINN//MTM2009-08587/ES/Ecuaciones Diferenciales Aleatorias Y Aplicaciones/ es_ES
dc.rights.accessRights Abierto es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Matemática Aplicada - Departament de Matemàtica Aplicada es_ES
dc.contributor.affiliation Universitat Politècnica de València. Instituto de Instrumentación para Imagen Molecular - Institut d'Instrumentació per a Imatge Molecular es_ES
dc.description.bibliographicCitation Rodríguez Álvarez, MJ.; Sánchez, F.; Soriano Asensi, A.; Iborra Carreres, A. (2010). Sparse Givens resolution of large system of linear equations: applications to image reconstruction. Mathematical and Computer Modelling. 52(7-8):1258-1264. https://doi.org/10.1016/j.mcm.2010.03.016 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://dx.doi.org/10.1016/j.mcm.2010.03.016 es_ES
dc.description.upvformatpinicio 1258 es_ES
dc.description.upvformatpfin 1264 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 52 es_ES
dc.description.issue 7-8 es_ES
dc.relation.senia 39755 es_ES
dc.contributor.funder Ministerio de Ciencia e Innovación es_ES
dc.contributor.funder Generalitat Valenciana es_ES


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