Cross-sectional optical coherence tomography images of human coronary arteries depicting the most frequently observed artifacts: A. Vessel “out-of-screen.“

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OCT= Optical Coherence Tomography

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Cross-sectional optical coherence tomography images of human coronary arteries depicting the most frequently observed artifacts: A. Vessel “out-of-screen.“ B. Sew-up artifact resulting in misalignment of the image. C. Nonuniform rotational distortion (NURD), usually produced by a tight bend or by an imperfection in the torque wire or sheath that interferes with rotation speed. D. Incomplete intracoronary blood displacement causing light attenuation. E. The presence of blood inside the image catheter sheath. F. Fold-over artifact observed in a large vessel bifurcation. G. Saturation artifact; some scan lines have a streaked appearance. H. Light attenuation caused by air bubbles within the silicon lubricant used to reduce friction between the sheath and the optic fiber in time-domain optical coherence tomography (TD-OCT) systems. I. Eccentric intraluminal location of the ImageWire can distort stent reflection, causing struts to align toward the imaging wire (“ sunflower effect“ , left box) or appear elongated (“ merry-go-round“ , right box). Source: Chapter 20. Coronary Intravascular Imaging, Hurst's The Heart, 13e Citation: Fuster V, Walsh RA, Harrington RA. Hurst's The Heart, 13e; 2011 Available at: https://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/Books/hurs13/hurs13_c020f004.jpg&sec=40284040&BookID=376&ChapterSecID=40279746&imagename= Accessed: October 16, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved