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US 2026/0076752 A1Published application
Catheter representation using a dynamic spring model
AssigneeBiosense Webster (Israel) Ltd.
InventorAssaf Govari
Life of this patent
Estimating the term…
Abstract
A method includes receiving time-varying boundary condition values measured for a probe inside a cavity of an organ of a patient. A time-dependent shape of the probe is calculated by (a) representing sections of the probe as first springs, (b) representing external forces acting on the sections as second springs, and (c) solving a set of coupled equations of motion, for the first springs and the second springs, so as to meet the time-varying boundary condition values. The shape is presented to a user.
Claims16
A system, comprising:
- an interface, which is configured to receive time-varying boundary condition values measured for a catheter inside a cavity of an organ of a patient by receiving at least one of position indicative signals or contact-force indicative signals from a plurality of sensors located along a length of the catheter, the time-varying boundary condition values comprising positions of multiple points corresponding to positions of the plurality of sensors;
- and
- a processor, configured to:
- calculate a time-dependent shape of multiple adjacent elastic sections of the catheter at each sensor position using the time-varying boundary condition values, by:
- representing adjacent elastic sections of the catheter as a chain of first springs, wherein motion of each of the first springs is governed by a first equation of motion;
- representing external forces acting on the adjacent elastic sections as a set of second springs, wherein motion of each of the second springs is governed by a second equation of motion;
- and
- combining the first and second equations of motion for each elastic section to find a position of each elastic section that satisfies the time-varying boundary condition values;
- and
- a display configured to depict the positions of the multiple points of the catheter.
7 more elements
A method, comprising:
- receiving at least one of position indicative signals or contact-force indicative signals from a plurality of sensors located along a length of a catheter inside a cavity of an organ of a patient;
- determining time-varying boundary condition values for the catheter, the time-varying boundary condition values comprising positions of multiple points corresponding to positions of the plurality of sensors;
- calculating a time-dependent shape of multiple adjacent elastic sections of the catheter at each sensor position using the time-varying boundary condition values, by:
- representing adjacent elastic sections of the catheter as a chain of first springs, wherein motion of each of the first springs is governed by a first equation of motion;
- representing external forces acting on the adjacent elastic sections as a set of second springs, wherein motion of each of the second springs is governed by a second equation of motion;
- and
- combining the first and second equations of motion for each elastic section to find a position of each elastic section that satisfies the time-varying boundary condition values;
- and
- displaying the positions of the multiple points of the catheter.
6 more elements
Dependencies are inferred from the claim text.