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. 2018 Feb 1;13(2):e0190427. doi: 10.1371/journal.pone.0190427

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© 2018 Cohen 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 8 — (A) The mean ratio of CBF to BOLD signal is plotted across subjects in active voxels (CBF/BOLD response ratio) for SS (left) and HD data (right). The response ratio was examined for non-denoised (PW/E2) and denoised data (PWDN/MECDN). No significant difference was observed between the non-denoised and denoised response ratios averaged across the middle five activation TRs (TR #s 8–12). (B) CBF/BOLD response ratio plotted against baseline CBF for SS (left) and HD data (right). A significant negative correlation was observed between the CBF/BOLD ratio and mean baseline CBF for all processing schemes except for HD, PW/E2 which trended toward significance.