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. 2019 Dec 18;10:121. doi: 10.1186/s13244-019-0801-z

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© The Author(s). 2019

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. 15 — Axial T1-weighted fat-saturated MR in late arterial phase obtained (a) pretreatment: image shows arterial phase hyperenhancement (APHE) of a 18-mm LR-5 observation (arrow). b 6 weeks post microwave ablation (MWA): image shows two nonspecific APHE perilesional nodules possibly representing perfusional changes (arrowhead). At this point, treated observation is categorized LR-TR equivocal. c 3 months post MWA: image shows disappearance of nodules in treatment zone; the treated observation is now categorized LR-TR Nonviable