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. 2015 May 13;42(8):1202–1222. doi: 10.1007/s00259-015-3059-9

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© The Author(s) 2015

Open Access This 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.

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Fig. 2 — Differences in measured total activity in the FoV with respect to the expected total activity over all four imaging time points for (a) GE Healthcare ToF systems (N = 21), (b) GE Healthcare non-ToF systems (N = 23), (c) Philips ToF systems (N = 8), (d) Philips non-ToF systems (N = 1), (e) Siemens ToF systems (N = 28), (f) Siemens non-ToF reconstructions (N = 28, including only ‘PROMPTS + RANDOMS’ mode acquisitions, see explanation in text). Each datum is the mean for all scanners and the error bars represent one standard deviation (SD) of the measured values