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  A Parallel Transmit Spectral-Spatial Pulse Design Method for Ultra-High Field MRS Combining LSQR and Optimal Control Based Optimization

Shao, T., Zhang, Y., Avdievich, N., Glaser, S., & Henning, A. (2015). A Parallel Transmit Spectral-Spatial Pulse Design Method for Ultra-High Field MRS Combining LSQR and Optimal Control Based Optimization. In 23rd Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2015).

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 Creators:
Shao, T1, 2, Author           
Zhang, Y, Author
Avdievich, NI1, 2, Author           
Glaser, S2, 3, Author           
Henning, A1, 2, Author           
Affiliations:
1Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497796              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              
3Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              

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 Abstract: This work presents a new spectral-spatial (SPSP) parallel transmit pulse design method for 1H MRS applications in ultra-high field MRI. Based on the recently developed parallel transmission technology, the pulse is first designed by using a subspace preconditioned LSQR method in purpose of locating a global minimum, and is afterwards optimized by using a quasi-Newton based optimal control (OC) method to find a local minimum answer. By combining these two algorithms in this way, SPSP pulses that offer increased robustness against B1+ inhomogeneity and minimized chemical shift displacement artifacts can be achieved and therefore adopted in MRS applications.

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 Dates: 2015-06
 Publication Status: Published in print
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 Identifiers: BibTex Citekey: ShaoZAGH2015
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Title: 23rd Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2015)
Place of Event: Toronto, Canada
Start-/End Date: 2015-05-30 - 2015-06-05

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Title: 23rd Annual Meeting and Exhibition of the International Society for Magnetic Resonance in Medicine (ISMRM 2015)
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: 0918 Start / End Page: - Identifier: -