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Journal of Biomedical Optics

Intravascular optical coherence tomography light scattering artifacts: merry-go-rounding, blooming, and ghost struts
Author(s): J. Jacob Mancuso; David L. Halaney; Sahar Elahi; Derek Ho; Tianyi Wang; Yongjian Ouyang; Jouke Dijkstra; Thomas E. Milner; Marc D. Feldman
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Paper Abstract

We sought to elucidate the mechanisms underlying two common intravascular optical coherence tomography (IV-OCT) artifacts that occur when imaging metallic stents: “merry-go-rounding” (MGR), which is an increase in strut arc length (SAL), and “blooming,” which is an increase in the strut reflection thickness (blooming thickness). Due to uncontrollable variables that occur in vivo, we performed an in vitro assessment of MGR and blooming in stented vessel phantoms. Using Xience V and Driver stents, we examined the effects of catheter offset, intimal strut coverage, and residual blood on SAL and blooming thickness in IV-OCT images. Catheter offset and strut coverage both caused minor MGR, while the greatest MGR effect resulted from light scattering by residual blood in the vessel lumen, with 1% hematocrit (Hct) causing a more than fourfold increase in SAL compared with saline (p<0.001). Residual blood also resulted in blooming, with blooming thickness more than doubling when imaged in 0.5% Hct compared with saline (p<0.001). We demonstrate that a previously undescribed mechanism, light scattering by residual blood in the imaging field, is the predominant cause of MGR. Light scattering also results in blooming, and a newly described artifact, three-dimensional-MGR, which results in “ghost struts” in B-scans.

Paper Details

Date Published: 29 December 2014
PDF: 10 pages
J. Biomed. Opt. 19(12) 126017 doi: 10.1117/1.JBO.19.12.126017
Published in: Journal of Biomedical Optics Volume 19, Issue 12
Show Author Affiliations
J. Jacob Mancuso, The Univ. of Texas Health Science Ctr. at San Antonio (United States)
South Texas Veterans Health Care System (United States)
David L. Halaney, The Univ. of Texas Health Science Ctr. at San Antonio (United States)
South Texas Veterans Health Care System (United States)
Sahar Elahi, The Univ. of Texas at Austin (United States)
Derek Ho, The Univ. of Texas at Austin (United States)
Tianyi Wang, The Univ. of Texas at Austin (United States)
Yongjian Ouyang, The Univ. of Texas Health Science Ctr. at San Antonio (United States)
Jouke Dijkstra, Leiden Univ. Medical Ctr. (The Netherlands)
Thomas E. Milner, The Univ. of Texas at Austin (United States)
Marc D. Feldman, The Univ. of Texas Health Science Ctr. at San Antonio (United States)
South Texas Veterans Health Care System (United States)


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