A correction algorithm for undersampled images using dynamic segmentation and entropy based focus criterion

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dc.contributor.authorLisboa, JC
dc.contributor.authorGuarini, M
dc.contributor.authorIrarrazaval, P
dc.date.accessioned2024-01-10T13:10:51Z
dc.date.available2024-01-10T13:10:51Z
dc.date.issued2002
dc.description.abstractA post-processing technique is presented for correcting images undersampled in k-space. The method works by taking advantage of the image's background zeros (dynamically segmented through the application of a threshold) to extrapolate the missing k-space samples. The algorithm can produce good quality images from a small set of k-space frequencies with only a few iterations of simple matrix operations, using the image entropy as the focus criterion. It does not require any special patient preparation, extra pulse sequences, complex gradient programming or specialized hardware. This makes it a good candidate for any application that requires short scan times or where only few frequencies can be sampled. (C) 2002 Elsevier Science Inc. All rights reserved.
dc.fechaingreso.objetodigital2024-04-11
dc.format.extent8 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1016/S0730-725X(02)00591-X
dc.identifier.issn0730-725X
dc.identifier.pubmedidMEDLINE:12477563
dc.identifier.urihttps://doi.org/10.1016/S0730-725X(02)00591-X
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/77947
dc.identifier.wosidWOS:000179843400004
dc.information.autorucIngeniería;Guarini M;S/I;99643
dc.information.autorucIngeniería;Irarrázaval P;S/I;57376
dc.issue.numero9
dc.language.isoen
dc.nota.accesocontenido parcial
dc.pagina.final666
dc.pagina.inicio659
dc.publisherELSEVIER SCIENCE INC
dc.revistaMAGNETIC RESONANCE IMAGING
dc.rightsacceso restringido
dc.subjectk-space
dc.subjectundersampled
dc.subjectEXTRAPOLATION
dc.subjectRESOLUTION
dc.subject.ods03 Good Health and Well-being
dc.subject.odspa03 Salud y bienestar
dc.titleA correction algorithm for undersampled images using dynamic segmentation and entropy based focus criterion
dc.typeartículo
dc.volumen20
sipa.codpersvinculados99643
sipa.codpersvinculados57376
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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