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. 2016 Apr 8;18:17. doi: 10.1186/s12968-016-0239-0

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© Jacobs et al. 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 6 — Quality metrics for evaluating different AIF curves measured from the same study. Curve a is more characteristic of a good AIF than curve b due to a higher peak value (PV), larger upslope, shorter time to peak (TTP), and thinner full-width at half-maximum (FWHM). The m-value (Eq. 1) is also higher for curve a