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. 2017 Jan 12;19(5):736–745. doi: 10.1007/s11307-016-1040-z

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© The Author(s) 2017

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. 1 — Scheme showing radiochemical syntheses used for the preparation of both radiotracers. a Production of [¹⁸F]F₂, the attempted direct labeling reaction using the reagent, production of [¹⁸F]Selectfluor bis(triflate), and synthesis of [¹⁸F]F-DPA using electrophilic fluorination. b Nucleophilic fluorination of [¹⁸F]DPA-714 using the conventional, no-carrier-added Kryptofix 222/K⁺[¹⁸F]F⁻ complex.