Effect of catheter eccentricity on appearance of stent struts in IV-OCT images in presence of thick neointimas

Sahar Elahi; Marc D. Feldman; Jouke Dijkstra; Thomas E. Milner

doi:10.1117/12.2005668

8 March 2013 Effect of catheter eccentricity on appearance of stent struts in IV-OCT images in presence of thick neointimas

Sahar Elahi, Marc D. Feldman, Jouke Dijkstra, Thomas E. Milner

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Proceedings Volume 8565, Photonic Therapeutics and Diagnostics IX; 856540 (2013) https://doi.org/10.1117/12.2005668
Event: SPIE BiOS, 2013, San Francisco, California, United States

Abstract

Effect of catheter eccentricity on the appearance of stent struts in IV-OCT images in presence of thick neointimas was examined by simulation of light-stent interaction. A phantom blood vessel was constructed from a mix of polydimethylsiloxane (PDMS) and titanium dioxide to simulate the elastic and optical scattering properties of the arterial wall. A Cordis CYPHER^® sirolimus-eluting stent was deployed within the phantom vessel and high resolution Micro-CT images of the stent strut were recorded to create a three-dimensional representation. Simulation of IV-OCT catheter and reflection of light from the stent strut and neointima was implemented for different catheter eccentricities. An optical model of the IV-OCT catheter was constructed and IV-OCT images corresponding to rotation of the light beam over the stent strut were simulated. The measured parameters included intensity and optical path length of light reflecting from the stent strut and coupled into catheter. The results indicate that in presence of thick neointimas sunflower effect is not observed and neointimal thickness measurement using IV-OCT is consistent with true values irrespective of catheter eccentricity.

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Sahar Elahi, Marc D. Feldman, Jouke Dijkstra, and Thomas E. Milner "Effect of catheter eccentricity on appearance of stent struts in IV-OCT images in presence of thick neointimas ", Proc. SPIE 8565, Photonic Therapeutics and Diagnostics IX, 856540 (8 March 2013); https://doi.org/10.1117/12.2005668

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KEYWORDS

Image resolution

Scattering

Titanium dioxide

Light scattering

Aluminum

Intravascular ultrasound

Optical simulations

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