Undersampling k-space using fast progressive 3D trajectories

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dc.contributor.authorSpiniak, J
dc.contributor.authorGuesalaga, A
dc.contributor.authorMir, R
dc.contributor.authorGuarini, M
dc.contributor.authorIrarrazaval, P
dc.date.accessioned2024-01-10T13:44:03Z
dc.date.available2024-01-10T13:44:03Z
dc.date.issued2005
dc.description.abstractIn 3D MRI, sampling k-space with traditional trajectories can be excessively time-consuming. Fast imaging trajectories are used in an attempt to efficiently cover the k-space and reduce the scan time without significantly affecting the image quality. In many applications, further reductions in scan time can be achieved via undersampling of the k-space; however, no clearly optimal method exists. In most 3D trajectories the k-space is divided into regions that are sampled with shots that share a common geometry (e.g., spirals). A different approach is to design trajectories that gradually but uniformly cover the k-space. In the current work, successive shots progressively add sampled regions to the 3D frequency space. By cutting the sequence short, a natural undersampled method is obtained. This can be particularly efficient because in these types of trajectories the contribution of new information by later shots is less significant. In this work the performance of progressive trajectories for different degrees of undersampling is assessed with trajectories based on missile guidance (MG) ideas. The results show that the approach can be efficient in terms of reducing the scan time, and performs better than the stack of spirals (SOS) technique, particularly under nonideal conditions.
dc.format.extent7 páginas
dc.fuente.origenWOS
dc.identifier.doi10.1002/mrm.20626
dc.identifier.eissn1522-2594
dc.identifier.issn0740-3194
dc.identifier.pubmedidMEDLINE:16142719
dc.identifier.urihttps://doi.org/10.1002/mrm.20626
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/78828
dc.identifier.wosidWOS:000232348000017
dc.information.autorucIngeniería;Guarini M;S/I;99643
dc.information.autorucIngeniería;Guesalaga A;S/I;63871
dc.information.autorucIngeniería;Irarrázaval P;S/I;57376
dc.issue.numero4
dc.language.isoen
dc.nota.accesoSin adjunto
dc.pagina.final892
dc.pagina.inicio886
dc.publisherWILEY
dc.revistaMAGNETIC RESONANCE IN MEDICINE
dc.rightsregistro bibliográfico
dc.subjectMRI
dc.subjectk-space
dc.subject3D trajectories
dc.subjectundersampling
dc.subjectfast imaging
dc.subjectDESIGN
dc.subject.ods03 Good Health and Well-being
dc.subject.odspa03 Salud y bienestar
dc.titleUndersampling k-space using fast progressive 3D trajectories
dc.typeartículo
dc.volumen54
sipa.codpersvinculados99643
sipa.codpersvinculados63871
sipa.codpersvinculados57376
sipa.indexWOS
sipa.indexScopus
sipa.trazabilidadCarga SIPA;09-01-2024
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