Post-mapping automatic identification of pulmonary veins

Patent metadata

Field	Value
Publication number	US-10957057-B2
Application number	US-201816109018-A
Country	US
Kind code	B2
Filing date	Aug 22, 2018
Priority date	Aug 22, 2018
Publication date	Mar 23, 2021
Grant date	Mar 23, 2021

Abstract

A method includes calculating a center-of-mass of a volume of an organ of a patient in a computerized anatomical map of the volume. A location is found on the anatomical map, on a surface of the volume, that is farthest from the center-of-mass. The location is identified as a known anatomical opening of the organ.

First claim

The invention claimed is:

1. A method for finding and denoting anatomical features in an anatomical map, the method comprising:
receiving a map of an organ of a patient generated from data collected utilizing an electro-anatomical catheter positioned in the organ;
calculating a center-of-mass of a volume of the organ of a patient in a computerized anatomical map of the volume;
finding on the anatomical map a location on a surface of the volume that is farthest from the center-of-mass;
finding on the anatomical map one or more next-farthest locations on a surface of the volume, which are farthest from the center-of-mass after excluding the identified opening, and farthest from the identified opening among the one or more next-farthest locations, and identifying the next-farthest locations as one or more additional openings, wherein finding the next-farthest locations comprises iteratively finding each of the next-farthest locations by selecting each next-farthest location based on being farthest, among the one or more next-farthest locations, from the identified openings, until finding a pre-set number of locations; and
identifying the location as a known anatomical opening of the organ.

2. The method according to claim 1 , wherein finding the location comprises calculating paths from the center-of-mass to multiple locations on the surface of the volume, and finding a longest path among the multiple paths.

3. The method according to claim 2 , wherein identifying the location comprises including multiple locations on the surface of the volume that are within a predefined distance from the found location as being part of the opening.

4. The method according to claim 2 , wherein calculating the paths comprises dividing the surface of the volume into a given number of pixels, and calculating a shortest path to each pixel.

5. The method according to claim 1 , wherein the volume comprises a cardiac chamber.

6. The method according to claim 1 , further comprising presenting the found location to a user.

7. A system for finding and denoting anatomical features in an anatomical map, the system comprising:
an apparatus, including an electro-anatomical catheter, for creating an anatomical map, the electro-anatomical catheter being positioned within the organ to gather data for creating the map;
a memory, configured to store a computerized anatomical map of a volume of an organ of a patient; and
a processor, configured to:
calculate a center-of-mass of a volume of an organ of a patient in the anatomical map;
find on the anatomical map a location on a surface of the volume that is farthest from the center-of-mass;
find on the anatomical map one or more next-farthest locations on a surface of the volume, which are farthest from the center-of-mass after excluding the identified opening, and farthest from the identified opening among the one or more next-farthest locations, and to identify the next-farthest locations as one or more additional openings, wherein the processor is configured to iteratively find each of the next-farthest locations by selecting each next-farthest location based on being farthest, among the one or more next-farthest locations, from the identified openings, until finding a pre-set number of locations; and
identify the location as a known anatomical opening of the organ.

8. The system according to claim 7 , wherein the processor is configured to find the location by calculating paths from the center-of-mass to multiple locations on the surface of the volume, and finding a longest path among the multiple paths.

9. The system according to claim 8 , wherein the processor is configured to identify the location by including multiple locations on the surface of the volume that are within a predefined distance from the found location as being part of the opening.

10. The system according to claim 8 , wherein the processor is configured to calculate the paths by dividing the surface of the volume into a given number of pixels, and calculating a shortest path to each pixel.

11. The system according to claim 7 , wherein the processor is configured to calculate a center of mass inside a mapped volume of a cardiac chamber.

12. The system according to claim 7 , wherein the processor is further configured to present the one or more found farthest locations to a user.

Assignees

• Biosense Webster Israel Ltd

Inventors

• Cohen Assaf
• Doron Itai
• Massarwi Fady
• Ilan Ido
• Zoabi Akram

Classifications

• G06T2207/30048

  Heart; Cardiac · CPC title

• G06T2207/30021

  Catheter; Guide wire · CPC title

• G06T2207/10132

  Ultrasound image · CPC title

• G06T2207/10068

  Endoscopic image · CPC title

• G06T17/00

  Three-dimensional [3D] modelling for computer graphics · CPC title