Reconstruction of undersampled dynamic images by modeling the motion of object elements

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dc.catalogadorgjm
dc.contributor.authorPrieto Vásquez, Claudia
dc.contributor.authorBatchelor, Philip G.
dc.contributor.authorHill, D.L.G.
dc.contributor.authorHajnal, Joseph V.
dc.contributor.authorGuarini Hermann, Marcelo Walter
dc.contributor.authorIrarrázaval Mena, Pablo
dc.date.accessioned2023-05-19T20:51:20Z
dc.date.available2023-05-19T20:51:20Z
dc.date.issued2007
dc.description.abstractDynamic MRI is restricted due to the time required to obtain enough data to reconstruct the image sequence. Several undersampled reconstruction techniques have been proposed to reduce the acquisition time. In most of these techniques the nonacquired data are recovered by modeling the temporal information as varying pixel intensities represented in time or in temporal frequencies. Here we propose a new approach that recovers the missing data through a motion estimation of the object elements ('' obels,'' or pieces of tissue) of the image. This method assumes that an obel displacement through the sequence has lower bandwidth than fluctuations in pixel intensities caused by the motion, and thus it can be modeled with fewer parameters. Preliminary results show that this technique can effectively reconstruct (with root mean square (RMS) errors below 4%) cardiac images and joints with undersampling factors of 8 and 4, respectively. Moreover, in the reconstruction process an approximation of the motion vectors is obtained for each obel, which can be used to quantify dynamic information. In this method the motion need not be confined to a part of the field of view (FOV) or to a portion of the temporal frequency. It is appropriate for dynamic studies in which the obels' motion model has fewer parameters than the number of acquired samples.
dc.fechaingreso.objetodigital2023-07-14
dc.fuente.origenORCID
dc.identifier.doi10.1002/mrm.21222
dc.identifier.eissn1522-2594
dc.identifier.issn0740-3194
dc.identifier.urihttps://doi.org/10.1002/mrm.21222
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/70470
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; 0000-0002-5186-2642; 57376
dc.issue.numero5
dc.language.isoen
dc.nota.accesoContenido completo
dc.pagina.final949
dc.pagina.inicio939
dc.revistaMagnetic Resonance in Medicine
dc.rightsacceso abierto
dc.subjectDynamic imaginges_ES
dc.subjectUndersamplinges_ES
dc.subjectReconstructiones_ES
dc.subjectObeles_ES
dc.subjectObject elementes_ES
dc.subjectMotiones_ES
dc.subject.ddc620
dc.subject.deweyIngenieríaes_ES
dc.titleReconstruction of undersampled dynamic images by modeling the motion of object elementses_ES
dc.typeartículo
dc.volumen57
sipa.codpersvinculados14195
sipa.codpersvinculados99643
sipa.codpersvinculados57376
sipa.trazabilidadORCID;14-07-2023
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