Patent ID: 8983575
Filing Date: 2015-03-17
Classification: A61B

Abstract:
1. A device for determining a position of an instrument in a vascular system, comprising: two localizers fitted to the instrument, each of the localizers incorporating a magnetic field sensor configured to measure a plurality of spatial positions of the localizers used to determine an orientation of the instrument and/or a shape of a section of the instrument between the two localizers; a memory to store a vascular map representing a vascular layout of the vascular system in which the instrument is positioned; and a processor configured to correct the measured plurality of spatial positions of the localizers taking into account a distance of the spatial positions from the vascular layout represented on the vascular map, a difference between the spatial positions of the two localizers, and a quality dimension including a first weighted component indicating a deviation of the measured plurality of spatial positions of the two localizers from the vascular layout as represented by the vascular map, and a second weighted component indicating a deviation of the measured orientation of the instrument and/or shape of the section from the vascular layout as represented by the vascular map.