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

Arash Taki*, Alireza Roodaki, Seyed Kamaledin Setarehdan, Sara Avansari, Gozde Unal, Nassir Navab

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)

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.

Original languageEnglish
Pages (from-to)268-280
Number of pages13
JournalComputers in Biology and Medicine
Volume43
Issue number4
DOIs
Publication statusPublished - 1 May 2013
Externally publishedYes

Keywords

  • Characterization
  • IVUS
  • Plaque
  • Virtual histology

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