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1. (WO2018165478) SHELL-CONSTRAINED LOCALIZATION OF VASCULATURE

Pub. No.:    WO/2018/165478    International Application No.:    PCT/US2018/021614
Publication Date: Fri Sep 14 01:59:59 CEST 2018 International Filing Date: Fri Mar 09 00:59:59 CET 2018
IPC: A61B 6/00
G06T 7/00
G06T 7/55
G06T 17/00
Applicants: CATHWORKS LTD.
Inventors: HARISH, Omri
SHILON, Ofek
LAVI, Guy
Title: SHELL-CONSTRAINED LOCALIZATION OF VASCULATURE
Abstract:
Methods of and systems for reconstructing a vascular tree shape from vascular segments imaged in a single source 2-D projection image are described. A structuring shape comprising spatial positions of reference anatomical elements is defined, such as vascular segments in the definition of a 3-D surface model corresponding to a surface defined by an anatomical structure such as a body organ (e.g., heart). The 3-D surface model is used to create a 3-D model of anatomical elements (e.g., additional vascular segments of a cardiac vasculature) imaged in a source 2-D projection image, by back-projection to the 3-D surface model. The 3-D surface model is optionally aligned by first aligning the source 2-D projection image to the structuring shape. In some embodiments, the source 2-D projection image is registered to the 3-D surface model through the structuring shape by the source image's initial use in defining the structuring shape.