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. 2021 Jan 28;11:2524. doi: 10.1038/s41598-021-82271-8

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© The Author(s) 2021

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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70-year-old man with essential tremor. Preoperative SWAN sequence detects a hypointense lesion in the left frontal lobe (A, arrow), not corresponding to calcification on CT image (B). Axial and coronal intraoperative T2-weighted FRFSE show the no-pass region that was placed during treatment planning [red circles in (C) and (D)], blocking 4 additional elements (4.6% of the total elements turned off).