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. 2021 Nov 3;8:755295. doi: 10.3389/fcvm.2021.755295

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Copyright © 2021 Ma, Chen, Ma, Liu, Zhang, Xu, Wang, Liu, Wang, Yang and Hou.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Two representative cases of the FAI difference in lesions with or without abnormal fractional flow reserve (FFR). (A) The left anterior descending (LAD) artery of a 60–65 years old patient. The FAI_lesion was −92 HU, and the FFR was 0.88 with a 70% lumen stenosis. (B) The LAD of a 70–75 years old patient. The FAI_lesion was −77 HU, and the FFR was 0.6 with a 78% lumen stenosis. FAI_lesion, lesion-specific fat attenuation index; LAD, left anterior descending; FFR, fractional flow reserve; HU, Hounsfield unit.