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. 2020 Jun 20;9(2):307–321. doi: 10.1007/s40119-020-00185-4

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License, which permits any non-commercial 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-nc/4.0/.

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Fig. 1 — Summarizing figure for situations where intracoronary imaging should be considered (Table 2). (1) OCT or IVUS for pre-PCI stent sizing and identification of deployment site, OCT for lesion characterization: OCT image showing severe calcifications. (2) IVUS for ostial left-main lesion assessment and guidance: IVUS image showing left-main plaque. (3) Functional measurement (FFR/iFR) for uncertainty about severity of distal lesions and OCT for composition: iFR/FFR and OCT image showing intimal thickening. (4) OCT for bifurcation lesion assessment and guidance: OCT image showing a bifurcation with high resolution. (5) OCT for post-PCI stent assessment and optimization and assessment of stent failure: OCT images demonstrating malapposition (white arrow shows an intraluminal stent strut) and in-stent restenosis (yellow arrow shows a stent strut covered by neointima hyperplasia)