An IVUS image-based approach for improvement of coronary plaque characterization

Authors:
Arash Taki;Alireza Roodaki;Seyed Kamaledin Setarehdan;Sara Avansari;Gozde Unal;Nassir Navab
Affiliations:
Department of Computer Aided Medical Procedures (CAMP), Technical University of Munich (TUM), Munich, Germany;Department of Signal Processing and Electronic Systems, Supelec, Gif-sur-Yvette, France;Control and Intelligent Processing Center of Excellence, School of Electrical and Computer Engineering, College of Engineering, University of Tehran, Tehran, Iran;Control and Intelligent Processing Center of Excellence, School of Electrical and Computer Engineering, College of Engineering, University of Tehran, Tehran, Iran;Faculty of Engineering and Natural Sciences, Sabanci University, Turkey;Department of Computer Aided Medical Procedures (CAMP), Technical University of Munich (TUM), Munich, Germany
Venue:
Computers in Biology and Medicine
Year:
2013

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Abstract

Virtual Histology-Intravascular Ultrasound (VH-IVUS) is widely used for studying atherosclerosis plaque composition. However, one of the main limitations of the VH-IVUS relates to its dependence to the Electrocardiogram (ECG)-gated acquisition. To overcome this limitation, this paper proposes a robust image-based approach for characterization of the plaques using IVUS images. The proposed method consists of three main steps of (1) shadow detection: as an efficient preprocessing step to identify and remove acoustic shadow regions; (2) feature extraction: a combination of gray-scale based features and textural descriptors; and (3) classification: to classify each pixel into one of the three classes (calcium, necrotic core and fibro-fatty). In order to evaluate the efficiency of the proposed algorithm two in-vivo and ex-vivo data sets are considered. The kappa values of 0.639 on in-vivo and 0.628 on ex-vivo tests with VH-IVUS and the histology images labeled by the experts respectively indicate the effectiveness of the proposed algorithm.