System for determining the orientation of a catheter

摘要

The present invention relates to a system for determining the orientation of a catheter (2). The system comprises a catheter (2), an asymmetric marker (11) attached to the catheter (2), and an imaging unit (25) for generating a projection image of the asymmetric marker (11), wherein the imaging unit (25) comprises a radiation source for generating radiation for projecting the asymmetric marker (11) in a projection plane and a detection unit for generating the projection image of the asymmetric marker (11) projected in the projection plane. The system comprises further an orientation determination unit for determining the orientation of the asymmetric marker (11) from the projection image of the asymmetric marker (11) and for determining the orientation of the catheter (2) from the determined orientation of the asymmetric marker (11). The asymmetric marker (11) is adapted such that the orientation of the asymmetric marker (11) is determinable from the projection image of the asymmetric marker (11) alone.

主权项

1. A system for determining the orientation of a catheter, the system comprising:
a catheter, an asymmetric marker attached to the catheter, an imaging unit configured to generate a projection image of the asymmetric marker, wherein the imaging unit comprises a radiation source for generating radiation for projecting the asymmetric marker in a projection plane and a detection unit configured to generate the projection image of the asymmetric marker projected in the projection plane, and an orientation determination unit configured to determine the orientation of the asymmetric marker from the projection image of the asymmetric marker and to determine the orientation of the catheter from the orientation of the asymmetric marker,
wherein the asymmetric marker is configured such that the orientation of the asymmetric marker is determinable from the projection image of the asymmetric marker alone, wherein the asymmetric marker comprises a ring element configured to fit around the catheter and an asymmetric element comprising two legs having different lengths protruding outward from the ring element, and attached to the ring element forming a v-shape;wherein the two legs are configured to be distinguishable and separately identifiable from each other in the projection image.