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. 2018 Feb 15;167:191–202. doi: 10.1016/j.neuroimage.2017.11.031

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© 2017 The Authors

This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

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Fig. 8 — In-plane spatial distribution of breathing-induced field fluctuations in sagittal and transversal slices acquired during normal free breathing. A) Mean magnitude image of FLASH acquisition. B) Standard deviation of measured field fluctuations. D) Standard deviation of field residual after removing the field accounted for by the respiratory trace model (Simulated trace corr.). C,E) Standard deviation after subtracting the contribution of up to 1^st- or 3^rd-order spherical harmonic fields in-plane (Simulated shimming). F) Standard deviation of field residual after subtracting the contribution of the first in-plane PC (Simulated PC corr.). G-H) First and second in-plane principal component.