Automated peroperative assessment of stents apposition from OCT pullbacks - Archive ouverte HAL Access content directly
Journal Articles Computers in Biology and Medicine Year : 2015

Automated peroperative assessment of stents apposition from OCT pullbacks

Abstract

This study's aim was to control the stents apposition by automatically analyzing endovascular optical coherence tomography (OCT) sequences. Lumen is detected using threshold, morphological and gradient operators to run a Dijkstra algorithm. Wrong detection tagged by the user and caused by bifurcation, struts'presence, thrombotic lesions or dissections can be corrected using a morphing algorithm. Struts are also segmented by computing symmetrical and morphological operators. Euclidian distance between detected struts and wall artery initializes a stent's complete distance map and missing data are interpolated with thin-plate spline functions. Rejection of detected outliers, regularization of parameters by generalized cross-validation and using the one-side cyclic property of the map also optimize accuracy. Several indices computed from the map provide quantitative values of malapposition. Algorithm was run on four in-vivo OCT sequences including different incomplete stent apposition's cases. Comparison with manual expert measurements validates the segmentation׳s accuracy and shows an almost perfect concordance of automated results.
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Dates and versions

hal-01957012 , version 1 (17-12-2018)

Identifiers

  • HAL Id : hal-01957012 , version 1

Cite

Florian Dubuisson, Emilie Pery, Lemlih Ouchchane, Nicolas Combaret, Claude Kauffmann, et al.. Automated peroperative assessment of stents apposition from OCT pullbacks. Computers in Biology and Medicine, 2015, 59, pp.98-105. ⟨hal-01957012⟩
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