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. Author manuscript; available in PMC: 2011 Oct 1.
Published in final edited form as: Magn Reson Med. 2010 Oct;64(4):1068–1077. doi: 10.1002/mrm.22502

Figure 1.

Figure 1

Reweighting illustration. Initially, the estimated background phase is biased significantly towards the hot spot. However, because the residual is highest in the hot spot, that area is increasingly downweighted in subsequent reweights, while the fit outside the hot spot becomes increasingly accurate. After 10 reweights, the hot spot is masked out entirely, and the background phase has been accurately estimated.