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. 2017 Nov 25;2:14. doi: 10.1186/s41181-017-0033-9

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© The Author(s) 2017

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.

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Fig. 4 — Transversal slices of PET scans of Derenzo phantoms (hole diameter ranging from 0.8–1.3 mm in 0.1 mm steps) filled with >99% ⁴⁴Sc (a), 66.2% ⁴³Sc (b) and 98.2% ⁴³Sc (c). The acquisition of the PET scans was performed in an energy window of 400–700 keV for 30 min, in order to obtain a total number of ~6 × 10⁷ coincidences