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  Optimization of k-Space Trajectories by Bayesian Experimental Design

Seeger, M., Nickisch, H., Pohmann, R., & Schölkopf, B. (2009). Optimization of k-Space Trajectories by Bayesian Experimental Design. Poster presented at 17th Annual Meeting of the International Society for Magnetic Resonance in Medicine (ISMRM 2009), Honolulu, HI, USA. Retrieved from http://www.ismrm.org/09/.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-C56B-F Version Permalink: http://hdl.handle.net/21.11116/0000-0003-17AB-3
Genre: Poster

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 Creators:
Seeger, M, Author              
Nickisch, H1, 2, Author              
Pohmann, R1, 3, Author              
Schölkopf, B1, 2, Author              
Affiliations:
1Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              
2Department Empirical Inference, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497795              
3Former Department MRZ, Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_2528700              

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 Abstract: MR image reconstruction from undersampled k-space can be improved by nonlinear denoising estimators since they incorporate statistical prior knowledge about image sparsity. Reconstruction quality depends crucially on the undersampling design (k-space trajectory), in a manner complicated by the nonlinear and signal-dependent characteristics of these methods. We propose an algorithm to assess and optimize k-space trajectories for sparse MRI reconstruction, based on Bayesian experimental design, which is scaled up to full MR images by a novel variational relaxation to iteratively reweighted FFT or gridding computations. Designs are built sequentially by adding phase encodes predicted to be most informative, given the combination of previous measurements with image prior information.

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 Dates: 2009-04
 Publication Status: Published online
 Pages: -
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 Identifiers: URI: http://www.ismrm.org/09/
BibTex Citekey: 5863
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Title: 17th Annual Meeting of the International Society for Magnetic Resonance in Medicine (ISMRM 2009)
Place of Event: Honolulu, HI, USA
Start-/End Date: 2009-04-18 - 2009-04-24

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Title: 17th Annual Meeting of the International Society for Magnetic Resonance in Medicine (ISMRM 2009)
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: 2627 Start / End Page: - Identifier: -