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. 2019 Jun 6;14(6):e0217842. doi: 10.1371/journal.pone.0217842

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© 2019 Liu et al

This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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Fig 7 — Representative maps are shown for R2 (A), R2* (B) and R2′ (C). The first two maps were obtained using voxel by voxel curve fitting with an exponential decay function and the R2′ map was obtained by subtraction (R2* ‒ R2). The units of the scale bar are S^-1. Images show sample wells in the phantom, in cross section. From left to right in the top row are M 24h-Fe, P 24h-Fe, P and P+Fe. Along the bottom row, from left to right, there is a well filled with 4% gelatin and a polystyrene marker for reference. Maps are provided for display only; relaxation rates (Fig 8) were determined as outlined in Methods.