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k-t2 BLAST: Exploiting spatiotemporal structure in simultaneous cardiac and respiratory resolved volume imaging
Linköping University, Center for Medical Image Science and Visualization, CMIV. Linköping University, Department of Medicine and Health Sciences, Clinical Physiology . Linköping University, Faculty of Health Sciences.
Linköping University, Center for Medical Image Science and Visualization, CMIV. Linköping University, Department of Medicine and Health Sciences, Clinical Physiology . Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Heart Centre, Department of Thoracic and Vascular Surgery.
Linköping University, Center for Medical Image Science and Visualization, CMIV. Linköping University, Department of Medicine and Health Sciences, Clinical Physiology . Linköping University, Faculty of Health Sciences. Östergötlands Läns Landsting, Heart Centre, Department of Clinical Physiology. (Department of Radiology, Stanford University, Stanford, California)
Linköping University, Department of Biomedical Engineering, Medical Informatics. Linköping University, The Institute of Technology.ORCID iD: 0000-0002-9091-4724
2005 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Multidimensional imaging resolving both the cardiac and respiratory cycles simultaneously has the potential to describe important physiological interdependences between the heart and pulmonary processes. A fully five-dimensional acquisition with three spatial and two temporal dimensions is hampered, however, by the long acquisition time and low spatial resolution. A technique is proposed to reduce the scan time substantially by extending the k-t BLAST framework to two temporal dimensions. By sampling the k-t space sparsely in a lattice grid, the signal in the transform domain, x-f space, can be densely packed, exploiting the fact that large regions in the field of view have low temporal bandwidth. A volumetric online prospective triggering approach with full cardiac and respiratory cycle coverage was implemented. Retrospective temporal interpolation was used to refine the timing estimates for the center of k-space, which is sampled for all cardiac and respiratory time frames. This resulted in reduced reconstruction error compared with conventional k-t BLAST reconstruction. The k-t2 BLAST technique was evaluated by decimating a fully sampled five-dimensional data set, and feasibility was further demonstrated by performing sparsely sampled acquisitions. Compared to the fully sampled data, a fourfold improvement in spatial resolution was accomplished in approximately half the scan time.

Place, publisher, year, edition, pages
2005.
Keyword [en]
k-t BLAST; respiration; volumetric MRI; cine imaging
National Category
Biomedical Laboratory Science/Technology
Identifiers
URN: urn:nbn:se:liu:diva-61159OAI: oai:DiVA.org:liu-61159DiVA: diva2:360800
Conference
The 13th Scientific Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM), 7-13 May, South Beach, Miami, Florida, USA
Available from: 2010-11-11 Created: 2010-11-04 Last updated: 2013-08-28Bibliographically approved

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k-t2 BLAST: Exploiting spatiotemporal structure in simultaneous cardiac and respiratory resolved volume imaging(84 kB)306 downloads
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Sigfridsson, AndreasEscobar Kvitting, John-PederWigström, LarsKnutsson, Hans

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Sigfridsson, AndreasEscobar Kvitting, John-PederWigström, LarsKnutsson, Hans
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Center for Medical Image Science and Visualization, CMIVClinical Physiology Faculty of Health SciencesDepartment of Thoracic and Vascular SurgeryDepartment of Clinical PhysiologyMedical InformaticsThe Institute of Technology
Biomedical Laboratory Science/Technology

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CiteExportLink to record
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