| Sparsity transform k-t principal component analysis for accelerating cine three-dimensional flow measurements. | |
| | |
MedLine Citation:
|
PMID: 22887065 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
|
Time-resolved three-dimensional flow measurements are limited by long acquisition times. Among the various acceleration techniques available, k-t methods have shown potential as they permit significant scan time reduction even with a single receive coil by exploiting spatiotemporal correlations. In this work, an extension of k-t principal component analysis is proposed utilizing signal differences between the velocity encodings of three-directional flow measurements to further compact the signal representation and hence improve reconstruction accuracy. The effect of sparsity transform in k-t principal component analysis is demonstrated using simulated and measured data of the carotid bifurcation. Deploying sparsity transform for 8-fold undersampled simulated data, velocity root-mean-square errors were found to decrease by 52 ± 14%, 59 ± 11%, and 16 ± 32% in the common, external, and internal carotid artery, respectively. In vivo, errors were reduced by 15 ± 17% in the common carotid artery with sparsity transform. Based on these findings, spatial resolution of three-dimensional flow measurements was increased to 0.8 mm isotropic resolution with prospective 8-fold undersampling and sparsity transform k-t principal component analysis reconstruction. Volumetric data were acquired in 6 min. Pathline visualization revealed details of helical flow patterns partially hidden at lower spatial resolution. Magn Reson Med, 2012. © 2012 Wiley Periodicals, Inc. |
| | |
Authors:
|
Verena Knobloch; Peter Boesiger; Sebastian Kozerke |
Related Documents
:
|
2589535 - Fluid secretion and microvillar ultrastructure in mosquito malpighian tubules. 15907475 - Mechanism of nodal flow: a conserved symmetry breaking event in left-right axis determi... 21257885 - Improved detection of subendocardial hyperenhancement in myocardial infarction using da... 3273085 - A dressing system providing fluid supply and suction drainage used for continuous or in... 7564085 - Theory and validation of access flow measurement by dilution technique during hemodialy... 9789535 - Hemovigilance: clinical tolerance of solvent-detergent treated plasma. |
Publication Detail:
|
Type: JOURNAL ARTICLE Date: 2012-8-6 |
Journal Detail:
|
Title: Magnetic resonance in medicine : official journal of the Society of Magnetic Resonance in Medicine / Society of Magnetic Resonance in Medicine Volume: - ISSN: 1522-2594 ISO Abbreviation: Magn Reson Med Publication Date: 2012 Aug |
Date Detail:
|
Created Date: 2012-8-13 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 8505245 Medline TA: Magn Reson Med Country: - |
Other Details:
|
Languages: ENG Pagination: - Citation Subset: - |
Copyright Information:
|
Copyright © 2012 Wiley Periodicals, Inc. |
Affiliation:
|
Institute for Biomedical Engineering, University and ETH Zurich, Zurich, Switzerland. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Fabrication of Transistors on Flexible Substrates: from Mass-Printing to High-Resolution Alternative...
Next Document: Influence of temperature on fluoride toxicity and bioaccumulation in the nonindigenous freshwater mo...