title   
  

IVUS-based histology of atherosclerotic plaques: improving longitudinal resolution

Taki, Arash and Pauly, Olivier and Setarehdan, S.Kamaledin and Ünal, Gözde and Navab, Nassir (2010) IVUS-based histology of atherosclerotic plaques: improving longitudinal resolution. In: Medical Imaging 2010: Ultrasonic Imaging, Tomography, and Therapy, San Diego, California, USA

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Official URL: http://dx.doi.org/10.1117/12.843791

Abstract

Although Virtual Histology (VH) is the in-vivo gold standard for atherosclerosis plaque characterization in IVUS images, it suffers from a poor longitudinal resolution due to ECG-gating. In this paper, we propose an image- based approach to overcome this limitation. Since each tissue have different echogenic characteristics, they show in IVUS images different local frequency components. By using Redundant Wavelet Packet Transform (RWPT), IVUS images are decomposed in multiple sub-band images. To encode the textural statistics of each resulting image, run-length features are extracted from the neighborhood centered on each pixel. To provide the best discrimination power according to these features, relevant sub-bands are selected by using Local Discriminant Bases (LDB) algorithm in combination with Fisher’s criterion. A structure of weighted multi-class SVM permits the classification of the extracted feature vectors into three tissue classes, namely fibro-fatty, necrotic core and dense calcified tissues. Results shows the superiority of our approach with an overall accuracy of 72% in comparison to methods based on Local Binary Pattern and Co-occurrence, which respectively give accuracy rates of 70% and 71%.

Item Type:Papers in Conference Proceedings
Additional Information:Article number: 76290Y
Subjects:Q Science > QA Mathematics > QA075 Electronic computers. Computer science
ID Code:15171
Deposited By:Gözde Ünal
Deposited On:23 Nov 2010 16:28
Last Modified:23 Nov 2010 16:28

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