Three-dimensional automatic quantitative analysis of intravascular ultrasound images

Gil Kovalski, Rafael Beyar, Rona Shofti, Haim Azhari

Research output: Contribution to journalArticle

Abstract

Intravascular ultrasound (IVUS) has established itself as a useful tool for coronary assessment. The vast amount of data obtained by a single IVUS study renders manual analysis impractical for clinical use. A computerized method is needed to accelerate the process and eliminate user-dependency. In this study, a new algorithm is used to identify the lumen border and the media-adventitia border (the external elastic membrane). Setting an initial surface on the IVUS catheter perimeter and using active contour principles, the surface inflates until virtual force equilibrium defined by the surface geometry and image features is reached. The method extracts these features in three dimensions (3-D). Eight IVUS procedures were performed using an automatic pullback device. Using the ECG signal for synchronization, sets of images covering the entire studied region and corresponding to the same cardiac phase were sampled. Lumen and media-adventitia border contours were traced manually and compared to the automatic results obtained by the suggested method. Linear regression results for vessel area enclosed by the lumen and media-adventitia border indicate high correlation between manual vs. automatic tracings (y = 1.07 x -0.38; r = 0.98; SD = 0.112 mm2; n = 88). These results indicate that the suggested algorithm may potentially provide a clinical tool for accurate lumen and plaque assessment. (C) 2000 World Federation for Ultrasound in Medicine and Biology.

Original languageEnglish (US)
Pages (from-to)527-537
Number of pages11
JournalUltrasound in Medicine and Biology
Volume26
Issue number4
DOIs
Publication statusPublished - May 2000
Externally publishedYes

Keywords

  • Active contours
  • IVUS
  • Plaque
  • Snakes
  • Ultrasound

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this