Semantic Processing of 3D Intravascular Ultrasound, General Secretariat for Research and Technology Operational Programme "Competitiveness" 2000-2006. The current project focuses on the research, development of specific techniquesalgorithms and implementation of an integrated system/tool for the 3D reconstruction of the vessel's model from 2D IVUS images. The specified tool will be used for the blood flow simulation through the examined vessel and will also support the semi-automatic semantic image processing and image annotation.