title: Automatic Lumen Detection on Longitudinal Ultrasound B-Mode Images of the Carotid Using Phase Symmetry.
abstract: This article describes a method that improves the performance of previous approaches for the automatic detection of the common carotid artery (CCA) lumen centerline on longitudinal B-mode ultrasound images. We propose to detect several lumen centerline candidates using local symmetry analysis based on local phase information of dark structures at an appropriate scale. These candidates are analyzed with selection mechanisms that use symmetry, contrast or intensity features in combination with position-based heuristics. Several experimental results are provided to evaluate the robustness and performance of the proposed method in comparison with previous approaches. These results lead to the conclusion that our proposal is robust to noise, lumen artifacts, contrast variations and that is able to deal with the presence of CCA-like structures, significantly improving the performance of our previous approach, from 87.5% ± 0.7% of correct detections to 98.3% ± 0.3% in a set of 200 images.
authors.affiliation: INESC TEC - INESC Technology and Science, FEUP, Rua Dr. Roberto Frias s/n, Porto 4200-465, Portugal. jrouco@fe.up.pt.
authors.forename: José
authors.initials: J
authors.lastname: Rouco
authors.affiliation: FMUP - Faculty of Medicine, University of Porto, Porto 4200-319, Portugal. eazevedo@med.up.pt.|Department of Neurology, São João Hospital Center, Porto 4200-319, Portugal. eazevedo@med.up.pt.
authors.forename: Elsa
authors.initials: E
authors.lastname: Azevedo
authors.affiliation: INESC TEC - INESC Technology and Science, FEUP, Rua Dr. Roberto Frias s/n, Porto 4200-465, Portugal. campilho@fe.up.pt.|FEUP - Faculty of Engineering, University of Porto, Porto 4200-465, Portugal. campilho@fe.up.pt.
authors.forename: Aurélio
authors.initials: A
authors.lastname: Campilho
mesh_terms: D000465:Algorithms; D050197:Atherosclerosis / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000473:pathology; D017536:Carotid Artery, Common / Q000000981:diagnostic imaging* / Q000473:pathology; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D008137:Longitudinal Studies; D014463:Ultrasonography / Q000379:methods*
keywords: carotid ultrasound; intima-media thickness; lumen detection