1. Articles from charles-etienne bisaillon

    1-10 of 10
    1. Artery phantoms for intravascular optical coherence tomography: diseased arteries

      Artery phantoms for intravascular optical coherence tomography: diseased arteries

      We propose and test various strategies for the creation of artery phantoms mimicking different kinds of diseased arteries when imaged by intravascular optical coherence tomography (IVOCT). We first review the method for making healthy artery phantoms. We then describe the procedure to fabricate diseased artery phantoms with intima thickening, lipid pool, thin-capped fibroatheroma, calcification, and restenosis (homogeneous and layered) after stent apposition. For each case, a phantom is fabricated, an IVOCT image is obtained, and the image is compared to that of a real artery.

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    2. Intravascular optical coherence tomography to characterize tissue deformation during angioplasty: preliminary experiments with artery phantoms

      Intravascular optical coherence tomography to characterize tissue deformation during angioplasty: preliminary experiments with artery phantoms

      We explored the potential of intravascular optical coherence tomography (IVOCT) to assess deformation during angioplasty balloon inflation. Using a semi-compliant balloon and artery phantoms, we considered two experimental scenarios. The goal for the first scenario was to investigate if variation in the elasticity of the structure surrounding the balloon could be sensed by IVOCT monitoring. In this scenario, we used three single-layer phantoms with various mechanical properties. Image analysis was performed to extract the inner and outer diameters of the phantoms at various pressures. The goal for the second scenario was twofold. First, we investigated the IVOCT capability to monitor ...

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    3. Review of tissue simulating phantoms with controllable optical, mechanical and structural properties for use in optical coherence tomography

      Review of tissue simulating phantoms with controllable optical, mechanical and structural properties for use in optical coherence tomography

      We review the development of phantoms for optical coherence tomography (OCT) designed to replicate the optical, mechanical and structural properties of a range of tissues. Such phantoms are a key requirement for the continued development of OCT techniques and applications. We focus on phantoms based on silicone, fibrin and poly(vinyl alcohol) cryogels (PVA-C), as we believe these materials hold the most promise for durable and accurate replication of tissue properties.

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    4. Artery phantoms for intravascular optical coherence tomography: healthy arteries

      Artery phantoms for intravascular optical coherence tomography: healthy arteries
      We present a method to make phantoms of coronary arteries for intravascular optical coherence tomography (IV-OCT). The phantoms provide a calibrated OCT response similar to the layered structure of arteries. The optical properties of each layer are achieved with specific concentrations of alumina and carbon black in a silicone matrix. This composition insures high durability and also approximates the elastic properties of arteries. The phantoms are fabricated in a tubular shape by the successive deposition and curing of liquid silicone mixtures on a lathe setup.
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    5. Intravascular optical coherence tomography on a beating heart model

      Intravascular optical coherence tomography on a beating heart model
      The advantages and limitations of using a beating heart model in the development of intravascular optical coherence tomography are discussed. The model fills the gap between bench experiments, performed on phantoms and excised arteries, and whole animal in-vivo preparations. The beating heart model is stable for many hours, allowing for extended measurement times and multiple imaging sessions under in-vivo conditions without the complications of maintaining whole-animal preparation. The perfusate supplying the heart with nutrients can be switched between light scattering blood to a nonscattering perfusate to allow the optical system to be optimized without the need of an efficient blood ...
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    6. Multilayer tubular phantoms for optical coherence tomography

      Multilayer tubular phantoms for optical coherence tomography
      We report preliminary results toward making artery phantoms for Optical Coherence Tomography (OCT) that also exhibit mechanical properties similar to arteries for large deformation regimes. A matrix of PVA cryogels is used to obtain the strain hardening effect characteristic of arteries. Means of adjusting the optical properties of PVA cryogels are investigated and the resulting mechanical properties are characterized.
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    7. Ex vivo imaging of early dental caries within the interproximal space

      Lin-P'ing Choo-Smith, Mark D. Hewko, Marc L. Dufour et al. Optical coherence tomography (OCT) is emerging as a technology that can potentially be used for the detection and monitoring of early dental enamel caries since it can provide high-resolution depth imaging of early lesions. To date, most caries detection optical technologies are well suited for exam ... [Proc. SPIE 7162, 716206 (2009)] published Wed Feb 18, 2009.
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    8. Durable optical phantoms with complex geometries and tissue-like mechanical properties

      In this paper, we present an approach toward the creation of coronary artery phantoms for optical coherence tomography (OCT). By mixing alumina powder in a matrix of transparent silicone, it is expected that the amplitude of the OCT signal and the soft tissue elasticity can be reproduced. The fabrication process to produce such multiple layer phantoms is presented along with optical and characterization experiments.
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    9. Deformable and durable phantoms with controlled density of scatterers

      Author(s): Charles-Etienne Bisaillon, Guy Lamouche, Romain Maciejko, Marc Dufour and Jean-Pierre Monchalin. Affiliation(s): Industrial Materials Institute, National Research Council Canada, 75 de Mortagne, Boucherville, Québec J4B 6Y4, Canada; Optoelectronics Laboratory, Engineering Physics, Ecole Polytechnique de Montréal, PO Box 6079, Station 'Centre-ville' Montréal, Québec H3C 3A7, Canada
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    1-10 of 10
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  2. Topics in the News

    1. (10 articles) National Research Council Canada
    2. (10 articles) Guy Lamouche
    3. (10 articles) Charles-Étienne Bisaillon
    4. (5 articles) Marc L. Dufour
    5. (3 articles) Polytechnique Montreal
    6. (3 articles) Jean-Pierre Monchalin
    7. (2 articles) Mark D. Hewko
    8. (2 articles) Michael G. Sowa
    9. (2 articles) Sebastien Vergnole
    10. (2 articles) Bruno Gauthier
    11. (1 articles) UCLA
    12. (1 articles) University of Michigan
    13. (1 articles) UC Irvine
    14. (1 articles) Semmelweis University
    15. (1 articles) Petra E. Wilder-Smith
    16. (1 articles) Zhongping Chen
    17. (1 articles) Jeehyun Kim
    18. (1 articles) Igor Kozak
    19. (1 articles) Optovue
    20. (1 articles) Optovue RTVue-100
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    Multilayer tubular phantoms for optical coherence tomography Intravascular optical coherence tomography on a beating heart model Artery phantoms for intravascular optical coherence tomography: healthy arteries Review of tissue simulating phantoms with controllable optical, mechanical and structural properties for use in optical coherence tomography Intravascular optical coherence tomography to characterize tissue deformation during angioplasty: preliminary experiments with artery phantoms Artery phantoms for intravascular optical coherence tomography: diseased arteries Advancing OCT Algorithmic Standardization Phase correction using programmable phase modulator (PPM) in optical coherence tomography Virtual reality simulator for vitreoretinal surgery using integrated OCT data Optical coherence tomography characteristics of the iris in Cogan-Reese syndrome Choroidal thinning in pseudoexfoliation syndrome detected by enhanced depth imaging optical coherence tomography Assessment of early occlusal caries pre- and post- sealant application—An imaging approach