Volume Calculation of Venous Thrombosis Using 2D Ultrasound Images

M Dhibi; J Puentes; L Bressollette; B Guias; B Solaiman

doi:10.1109/IEMBS.2005.1615339

Volume Calculation of Venous Thrombosis Using 2D Ultrasound Images

Conf Proc IEEE Eng Med Biol Soc. 2005:2005:4002-5. doi: 10.1109/IEMBS.2005.1615339.

Authors

M Dhibi¹, J Puentes, L Bressollette, B Guias, B Solaiman

Affiliation

¹ GET - ENST Bretagne, Département Image et Traitement de l'Information, Brest, France; INSERM - U650, Laboratoire de Traitement de l'Information Médicale, Brest, France.

PMID: 17281109
DOI: 10.1109/IEMBS.2005.1615339

Abstract

Venous thrombosis screening exams use 2D ultrasound images, from which medical experts obtain a rough idea of the thrombosis aspect and infer an approximate volume. Such estimation is essential to follow up the thrombosis evolution. This paper proposes a method to calculate venous thrombosis volume from non-parallel 2D ultrasound images, taking advantage of a priori knowledge about the thrombosis shape. An interactive ellipse fitting contour segmentation extracts the 2D thrombosis contours. Then, a Delaunay triangulation is applied to the set of 2D segmented contours positioned in 3D, and the area that each contour defines, to obtain a global thrombosis 3D surface reconstruction, with a dense triangulation inside the contours. Volume is calculated from the obtained surface and contours triangulation, using a maximum unit normal component approach. Preliminary results obtained on 3 plastic phantoms and 3 in vitro venous thromboses, as well as one in vivo case are presented and discussed. An error rate of volume estimation inferior to 4,5% for the plastic phantoms, and 3,5% for the in vitro venous thromboses was obtained.