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. 2024 Jul 4;23(4):242–249. doi: 10.1055/s-0044-1787995

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The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. ( https://creativecommons.org/licenses/by/4.0/ )

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 1 — Technetium-99m labeled tropane derivative (99mTc-TRODAT-1) brain single-photon emission computed tomography (SPECT) imaging for a patient with essential tremors. Showing semiquantitative evaluation. Region of interests (ROIs) were drawn over bilateral striatum and occipital cortex as the background. Striatal uptake ratios (SURs) were calculated as striatal ROI average counts per pixel (ACP) — occipital ROI ACP/striatal ROI ACP.