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Shim optimization with region of interest-specific Tikhonov regularization: Application to second-order slice-wise shimming of the brain

Abstract:
Purpose Slice-wise shimming can improve field homogeneity, but suffers from large noise propagation in the shim calculation. Here, we propose a robust shim current optimization for higher-order dynamic shim updating, based on Tikhonov regularization with a variable regularization parameter, 𝜆.
Theory and Methods 𝜆 was selected for each slice separately in a fully automatic procedure based on a combination of boundary constraints and an L-curve search alg... Expand abstract
Publication status:
Published
Peer review status:
Peer reviewed

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Publisher copy:
10.1002/mrm.28951

Authors


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Role:
Author
ORCID:
0000-0001-8852-6100
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Institution:
University of Oxford
Division:
MSD
Department:
Clinical Neurosciences
Oxford college:
St Cross College
Role:
Author
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Role:
Author
ORCID:
0000-0003-2432-4192
Wellcome Trust More from this funder
Publisher:
International Society for Magnetic Resonance in Medicine Publisher's website
Journal:
Magnetic Resonance in Medicine Journal website
Volume:
87
Issue:
3
Pages:
1218-1230
Publication date:
2021-11-16
Acceptance date:
2021-07-18
DOI:
EISSN:
1522-2594
ISSN:
0740-3194
Pmid:
34783374
Language:
English
Keywords:
Pubs id:
1210283
Local pid:
pubs:1210283
Deposit date:
2021-12-09

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