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US 9,955,889 B2Granted
Registration maps using intra-cardiac signals
AssigneeBiosense Webster (Israel) Ltd.
InventorsRoy Urman, Ronen Krupnik, Liron Shmuel Mizrahi
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Abstract
Cardiac catheterization is facilitated by generating first and second electroanatomic maps of a heart of a subject and designating common spatial locations that correspond to first electrical events on the first electroanatomic map and second electrical events on the second electroanatomic map. The common spatial locations of the first electroanatomic map and the second electroanatomic map are aligned to establish an aligned map, and using the location data on the aligned map to guide a probe to a point of interest.
Claims13
A method, comprising of steps of:
- using a first system to generate a first electroanatomic map of a heart of a living subject;
- using a second system that is different to the first system to generate a second electroanatomic map of the heart;
- identifying areas with common electrical events in the first and second electroanatomic maps and finding in those areas at least three points in each of the first and second electroanatomic maps where the local activation times of points in the first and second electroanatomic maps do not differ by more than a first threshold value and where the respective distances between the points on each electroanatomic map do not exceed a second threshold value;
- using the at least three points to designate common spatial locations that correspond to first electrical events on the first electroanatomic map and second electrical events on the second electroanatomic map;
- aligning the common spatial locations of the first electroanatomic map and the second electroanatomic map to establish a set of aligned maps;
- and
- using the set of aligned maps to guide a probe to a point of interest.
4 more elements
A data processing system comprising:
- a processor;
- a visual display screen;
- and
- a memory accessible to the processor storing programs and data objects therein, the programs including an electroanatomic map generator, an image registration program, an analysis program and a graphical user interface configured to present graphical information on the visual display screen, wherein execution of the programs cause the processor to perform the steps of:
- invoking the electroanatomic map generator to generate at least a first electroanatomic map of a heart of a living subject from a first system;
- invoking the electroanatomic map generator to generate a second electroanatomic map of the heart from a second system different to the first system;
- invoking the analysis program to analyze the first and second electroanatomic maps to identify areas with common electrical events in the first and second electroanatomic maps and finding at least three points in each of the first and second electroanatomic maps where the local activation times of points in the first and second electroanatomic maps do not differ by more than a first threshold value and where the respective distances between the points on each electroanatomic map do not exceed a second threshold value;
- invoking the analysis program to identify common spatial locations that correspond to first electrical events on the first electroanatomic map and second electrical events on the second electroanatomic map;
- and
- invoking the image registration program to align the common spatial locations of the first electroanatomic map and the second electroanatomic map to establish a third electroanatomic map.
7 more elements
Dependencies are inferred from the claim text.