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. 2016 Jul 20;32(10):1477–1481. doi: 10.1007/s10554-016-0940-y

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© The Author(s) 2016

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. 1 — Relationship between the plaque free wall (PFW) angle and plaque burden (PB). a The PFW_IVUS shows a strong inverse, non-linear correlation with the PB_IVUS with a crossover point PFW_C = 182° PFW. Final parameters: a = −0.069; b = 63.59; d = −0.163; e = 80.74. b A similar relationship is seen for the PFW_OCT angle with the PB_IVUS with a crossover point PFW_C = 186°. Final parameters: a = −0.032; b = 54.98; d = −0.169; e = 80.59. c Overlay of regression lines of (a) and (b). PFW_OCT and PFW_IVUS perform equally well in predicting PB in the region of PFW angle >186°. In the more diseased regions, the predictive value of the PFW_OCT angle is reduced compared to PFW_IVUS