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Suppression of MRI Truncation Artifacts Using Total Variation Constrained Data Extrapolation
Joint Authors
Frahm, Jens
Uecker, Martin
Block, Kai Tobias
Source
International Journal of Biomedical Imaging
Issue
Vol. 2008, Issue 2008 (31 Dec. 2008), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2008-09-07
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
The finite sampling of k-space in MRI causes spurious image artifacts, known as Gibbs ringing, which result from signal truncation at the border of k-space.
The effect is especially visible for acquisitions at low resolution and commonly reduced by filtering at the expense of image blurring.
The present work demonstrates that the simple assumption of a piecewise-constant object can be exploited to extrapolate the data in k-space beyond the measured part.
The method allows for a significant reduction of truncation artifacts without compromising resolution.
The assumption translates into a total variation minimization problem, which can be solved with a nonlinear optimization algorithm.
In the presence of substantial noise, a modified approach offers edge-preserving denoising by allowing for slight deviations from the measured data in addition to supplementing data.
The effectiveness of these methods is demonstrated with simulations as well as experimental data for a phantom and human brain in vivo.
American Psychological Association (APA)
Block, Kai Tobias& Uecker, Martin& Frahm, Jens. 2008. Suppression of MRI Truncation Artifacts Using Total Variation Constrained Data Extrapolation. International Journal of Biomedical Imaging،Vol. 2008, no. 2008, pp.1-8.
https://search.emarefa.net/detail/BIM-452663
Modern Language Association (MLA)
Block, Kai Tobias…[et al.]. Suppression of MRI Truncation Artifacts Using Total Variation Constrained Data Extrapolation. International Journal of Biomedical Imaging No. 2008 (2008), pp.1-8.
https://search.emarefa.net/detail/BIM-452663
American Medical Association (AMA)
Block, Kai Tobias& Uecker, Martin& Frahm, Jens. Suppression of MRI Truncation Artifacts Using Total Variation Constrained Data Extrapolation. International Journal of Biomedical Imaging. 2008. Vol. 2008, no. 2008, pp.1-8.
https://search.emarefa.net/detail/BIM-452663
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-452663