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  Estimating B0 inhomogeneities with projection FID navigator readouts

Loktyushin, A., Ehses, P., Schölkopf, B., & Scheffler, K. (2017). Estimating B0 inhomogeneities with projection FID navigator readouts. Poster presented at 25th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2017), Honolulu, HI, USA.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0000-C4C1-8 Version Permalink: http://hdl.handle.net/21.11116/0000-0000-F30D-0
Genre: Poster

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Loktyushin, A1, 2, Author              
Ehses, P2, Author              
Schölkopf, B1, 3, Author              
Scheffler, K2, 3, Author              
Affiliations:
1Dept. Empirical Inference, Max Planck Institute for Intelligent Systems, Max Planck Society, ou_1497647              
2Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497796              
3Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497794              

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 Abstract: B0 field inhomogeneities can negatively impact the image acquisition process, cause artifacts such as ghosting and blurring and introduce physiological noise in fMRI time series. It is common to address the static inhomogeneity components by using shim coils. Physiological motion during the acquisition can lead to temporal variations in the field configuration. Dynamic shimming necessitates fast, real-time estimation of B0 distortions. In this work, we augment projection-encoded FID readouts with a simple projection-based spatial encoding and train a neural network to learn the mapping from projection FIDs to field maps, which we obtain using a double-echo EPI sequence.

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 Dates: 2017-04-25
 Publication Status: Published in print
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 Identifiers: BibTex Citekey: LoktyushinESS2017
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Title: 25th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2017)
Place of Event: Honolulu, HI, USA
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Title: 25th Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2017)
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: 3903 Start / End Page: - Identifier: -