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Proceedings Paper

Tools for experimental characterization of the non-uniform rotational distortion in intravascular OCT probes
Author(s): Marc L. Dufour; Charles-Etienne Bisaillon; Guy Lamouche; Sebastien Vergnole; Mark Hewko; Frédéric D'Amours; Christian Padioleau; Michael Sowa
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Paper Abstract

The Industrial Material Institute (IMI) together with the Institute for Biodiagnostic (IBD) has developed its own optical catheters for cardiovascular imaging applications. Those catheters have been used experimentally in the in vitro coronary artery model of the Langendorff beating heart and in a percutaneous coronary intervention procedure in a porcine model. For some catheter designs, non-uniform rotational distortion (NURD) can be observed as expected from past experience with intra-vascular ultrasound (IVUS) catheters. A two-dimensional (2D) coronary artery test bench that simulates the path into the coronary arteries has been developed. The presence or absence of NURD can be assessed with the test bench using a custom-built cardiovascular Optical Coherence Tomography (OCT) imaging system. A square geometry instead of the circular shape of an artery is used to simulate the coronary arteries. Thereby, it is easier to visualize NURD when it is present. The accumulated torsion induced by the friction on the catheter is measured along the artery path. NURD is induced by the varying friction force that is balanced by the accumulated torsion force. The pullback force is measured and correlated with NURD observed in the 2D test bench. Finally, a model is presented to help understanding the mechanical constraint that leads to the friction force variations.

Paper Details

Date Published: 17 February 2011
PDF: 8 pages
Proc. SPIE 7883, Photonic Therapeutics and Diagnostics VII, 788339 (17 February 2011); doi: 10.1117/12.874705
Show Author Affiliations
Marc L. Dufour, National Research Council Canada (Canada)
Charles-Etienne Bisaillon, National Research Council Canada (Canada)
Guy Lamouche, National Research Council Canada (Canada)
Sebastien Vergnole, National Research Council Canada (Canada)
Mark Hewko, National Research Council Canada (Canada)
Frédéric D'Amours, National Research Council Canada (Canada)
Christian Padioleau, National Research Council Canada (Canada)
Michael Sowa, National Research Council Canada (Canada)

Published in SPIE Proceedings Vol. 7883:
Photonic Therapeutics and Diagnostics VII
Kenton W. Gregory M.D.; Nikiforos Kollias; Andreas Mandelis; Henry Hirschberg M.D.; Hyun Wook Kang; Anita Mahadevan-Jansen; Brian Jet-Fei Wong M.D.; Justus F. R. Ilgner M.D.; Bodo E. Knudsen M.D.; E. Duco Jansen; Steen J. Madsen; Guillermo J. Tearney; Bernard Choi; Haishan Zeng; Laura Marcu, Editor(s)

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