Motion estimation applied to reconstruct undersampled dynamic MRI

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dc.contributor.authorPrieto Vásquez, Claudia
dc.contributor.authorGuarini Hermann, Marcelo Walter
dc.contributor.authorHajnal, Joseph V.
dc.contributor.authorIrarrázaval Mena, Pablo
dc.date.accessioned2022-03-01T18:56:55Z
dc.date.available2022-03-01T18:56:55Z
dc.date.issued2007
dc.description.abstractMagnetic Resonance Imaging (MRI) has become an important tool for dynamic clinical studies. Regrettably, the long acquisition time is still a challenge in dynamic MRI. Several undersampled reconstruction techniques have been developed to speed up the acquisition without significantly compromising image quality. Most of these methods are based on modeling the pixel intensity changes. Recently, we introduced a new approach based on the motion estimation of each object element (obel, a piece of tissue). Although the method works well, the outcome is a trade off between the maximum undersampling factor and the motion estimation accuracy. In this work we propose to improve its performance through the use of additional data from multiple coils acquisition. Preliminary results on cardiac MRI show that further undersampling and/or improved reconstruction accuracy is achieved using this technique. Furthermore, an approximation of the vector field of motion is obtained. This method is appropriate for sequences where the obels' intensity through time is nearly constant.
dc.format.extent10 páginas
dc.fuente.origenORCID
dc.identifier.doi10.1007/978-3-540-77129-6_46
dc.identifier.issn03029743
dc.identifier.urihttp://www.scopus.com/inward/record.url?eid=2-s2.0-38149096141&partnerID=MN8TOARS
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/63272
dc.information.autorucEscuela de ingeniería ; Prieto Vásquez, Claudia ; 0000-0003-4602-2523 ; 14195
dc.information.autorucEscuela de ingeniería ; Guarini Hermann, Marcelo Walter ; S/I ; 99643
dc.information.autorucEscuela de ingeniería ; Irarrázaval Mena, Pablo ; S/I ; 57376
dc.language.isoen
dc.nota.accesoContenido completo
dc.pagina.final532
dc.pagina.inicio522
dc.provenancepolivero 2022-03-01 15:56:55
dc.relation.ispartofAdvances in Image and Video Technology, Berlin: Springer, 2007, 961 páginas
dc.rightsacceso abierto
dc.subjectMotion estimation
dc.subjectMRI
dc.subjectDynamic images
dc.subjectUndersampling
dc.subject.ddc620
dc.subject.deweyIngenieríaes_ES
dc.subject.otherIngeniería
dc.titleMotion estimation applied to reconstruct undersampled dynamic MRI
dc.typecapítulo de libro
sipa.codpersvinculados14195
sipa.codpersvinculados99643
sipa.codpersvinculados57376
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