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Gómez A, Tacheau A, Finet G, Lagache M, Martiel JL, Floc'h SL, Yazdani SK, Elias-Zuñiga A, Pettigrew RI, Cloutier G, Ohayon J. Intraluminal Ultrasonic Palpation Imaging Technique Revisited for Anisotropic Characterization of Healthy and Atherosclerotic Coronary Arteries: A Feasibility Study. ULTRASOUND IN MEDICINE & BIOLOGY 2019; 45:35-49. [PMID: 30348475 DOI: 10.1016/j.ultrasmedbio.2018.08.020] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/14/2018] [Revised: 08/09/2018] [Accepted: 08/27/2018] [Indexed: 06/08/2023]
Abstract
Accurate mechanical characterization of coronary atherosclerotic lesions remains essential for the in vivo detection of vulnerable plaques. Using intravascular ultrasound strain measurements and based on the mechanical response of a circular and concentric vascular model, E. I. Céspedes, C. L. de Korte and A. F. van der Steen developed an elasticity-palpography technique in 2000 to estimate the apparent stress-strain modulus palpogram of the thick subendoluminal arterial wall layer. More recently, this approach was improved by our group to consider the real anatomic shape of the vulnerable plaque. Even though these two studies highlighted original and promising approaches for improving the detection of vulnerable plaques, they did not overcome a main limitation related to the anisotropic mechanical behavior of the vascular tissue. The present study was therefore designed to extend these previous approaches by considering the orthotropic mechanical properties of the arterial wall and lesion constituents. Based on the continuum mechanics theory prescribing the strain field, an elastic anisotropy index was defined. This new anisotropic elasticity-palpography technique was successfully applied to characterize ten coronary plaque and one healthy vessel geometries of patients imaged in vivo with intravascular ultrasound. The results revealed that the anisotropy index-palpograms were estimated with a good accuracy (with a mean relative error of 26.8 ± 48.8%) compared with ground true solutions.
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Affiliation(s)
- Armida Gómez
- Laboratory TIMC-IMAG/DyCTiM, UGA, CNRS UMR 5525, Grenoble, France
| | - Antoine Tacheau
- Laboratory TIMC-IMAG/DyCTiM, UGA, CNRS UMR 5525, Grenoble, France
| | - Gérard Finet
- Department of Hemodynamics and Interventional Cardiology, Hospices Civils de Lyon and Claude Bernard University Lyon1, INSERM Unit 886, Lyon, France
| | - Manuel Lagache
- Laboratory SYMME, SYMME, University Savoie Mont-Blanc, France; Polytech Annecy-Chambéry, University Savoie Mont-Blanc, Le Bourget du Lac, France
| | | | - Simon Le Floc'h
- Laboratory LMGC, CNRS UMR 5508, University of Montpellier II, Montpellier, France
| | - Saami K Yazdani
- Department of Mechanical Engineering, University of South Alabama, Mobile, Alabama, USA
| | - Alex Elias-Zuñiga
- Department of Mechanical Engineering Instituto Tecnológico y de Estudios Superiores de Monterrey, Campus Monterrey, Monterrey, Mexico
| | | | - Guy Cloutier
- Laboratory of Biorheology and Medical Ultrasonics, University of Montreal Hospital Research Center (CRCHUM), Montréal, Québec, Canada
| | - Jacques Ohayon
- Laboratory TIMC-IMAG/DyCTiM, UGA, CNRS UMR 5525, Grenoble, France; Polytech Annecy-Chambéry, University Savoie Mont-Blanc, Le Bourget du Lac, France.
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