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Proceedings Paper

An integrated framework for spatio-temporal registration of intravascular ultrasound pullbacks
Author(s): Ling Zhang; Andreas Wahle; Zhi Chen; Richard Downe; John Lopez; Tomas Kovarnik; Milan Sonka
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Paper Abstract

Spatio-temporal registration of baseline and follow-up intravascular ultrasound (IVUS) pullbacks is of paramount importance in studying the progression/regression of coronary artery disease. Automating these two tasks has the potential to increase productivity when studying large patient populations. Current automated methods are often designed for only one of the two tasks - spatial or temporal. In this paper, we propose an integrated framework which combines the two tasks and employs side-branches to constrain the IVUS pullback registration tasks. For temporal registration, canonical time warping technique optimizes extracted features and weighs cumulative distances. For spatial registration, the search range of cross-correlation based method is constrained by utilizing the angular differences between side-branches. Pilot validation is currently available for ten pairs of IVUS pullback sub-sequences. Results show average spatial and temporal registration errors of 0.49 mm ± 0.51 mm and 5.56° ± 3.35°, respectively, a notable improvement over our previous approach (p < 0.001) in temporal registration. Our method has the potential to improve spatial and temporal correspondence in studies of atherosclerotic vascular disease development using IVUS.

Paper Details

Date Published: 17 March 2015
PDF: 7 pages
Proc. SPIE 9419, Medical Imaging 2015: Ultrasonic Imaging and Tomography, 94190Y (17 March 2015); doi: 10.1117/12.2082313
Show Author Affiliations
Ling Zhang, Iowa Institute for Biomedical Imaging (United States)
The Univ. of Iowa (United States)
Andreas Wahle, Iowa Institute for Biomedical Imaging (United States)
The Univ. of Iowa (United States)
Zhi Chen, Iowa Institute for Biomedical Imaging (United States)
The Univ. of Iowa (United States)
Richard Downe, Iowa Institute for Biomedical Imaging (United States)
John Lopez, Loyola Univ. (United States)
Tomas Kovarnik, Charles Univ. in Prague (Czech Republic)
Milan Sonka, The Univ. of Iowa (United States)

Published in SPIE Proceedings Vol. 9419:
Medical Imaging 2015: Ultrasonic Imaging and Tomography
Johan G. Bosch; Neb Duric, Editor(s)

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