Method for detecting contact with the wall of a region of interest
AssigneeSt Jude Medical International Holding, SA.R.L.
InventorAmit COHEN
Life of this patent
Estimating the term…
Abstract
A method for detecting when a tool contacts a wall of a region of interest includes the steps of: tracking the motion of the tool and creating a tool motion profile; calculating a correlation value representative of the correlation between the tool motion profile and a wall motion profile indicative of the motion of the wall; and determining when the correlation value exceeds a threshold indicative of contact of the tool with the wall of the region of interest.
Claims20
A method for detecting when a tool contacts a wall of a region of interest of a patient, the method comprising the steps of:
- tracking the motion of the tool and creating a tool motion profile;
- calculating a correlation value representative of the correlation between the tool motion profile and a wall motion profile indicative of the motion of the wall;
- and
- determining when the correlation value exceeds a threshold indicative of contact of the tool with the wall of the region of interest.
The method of claim of 8 wherein the at least one component is the time-based component, and wherein said comparing step includes the sub-steps of:
- determining a plurality of tool motion trajectories over a period of time to determine the relative time-based spatial positions of the tool;
- determining a plurality of wall motion trajectories over said period of time to determine relative time-based spatial positions of the wall;
- and
- conducting cyclicity analysis to determining repetitive patterns of tool motion trajectories and the wall motion trajectories to identify correlation.
The method of claim of 8 wherein the at least one component is the frequency-based component, and wherein said comparing step includes the sub-step of:
- determining whether a predetermined frequency component present in the wall motion is present in the tool motion.
A system for detecting when a catheter contacts a wall of a heart cavity in a body, comprising:
- a medical positioning system configured to determine a position of the catheter with the body;
- and
- a main control unit configured to (i) track the motion of said catheter and create a catheter motion profile;
- (ii) calculate a correlation value representative of a correlation between said catheter motion profile and a wall motion profile indicative of the motion of said wall;
- and (iii) determine when said correlation value exceeds a threshold indicative of contact of said catheter with said wall.
A system for detecting when a tool contacts a wall of a region of interest, the system comprising:
- a tool having a sensor associated with the distal end of the tool for tracking the movement of the tool;
- a medical positioning system for determining the position of the tool within a body;
- a main control unit configured to
- (i) create a tool motion profile based on tracking the motion of the tool;
- (ii) calculating a correlation value representative of the correlation between the tool motion profile and a wall motion profile indicative of the motion of the wall;
- and
- (iii) determining when the correlation value exceeds a threshold indicative of contact of the tool with the wall of the region of interest;
- and
- a contact indicator for signaling when the threshold level has been exceeded, therein indicating the tool is in contact with the wall of the region of interest.
Dependencies are inferred from the claim text.