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. 2018 Feb 20;5:5. doi: 10.1186/s40658-018-0204-0

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© The Author(s). 2018

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. 5 — Threshold level giving the accurate volume for different sphere diameters and SBRs are shown for ¹¹¹In-SPECT (a) and for ⁶⁸Ga-PET (b). The data for SBR 1.25:1 was not possible to obtain for ¹¹¹In-SPECT