Fast anatomical mapping (FAM) using volume filling

Patent metadata

Field	Value
Publication number	US-10918310-B2
Application number	US-201815861413-A
Country	US
Kind code	B2
Filing date	Jan 3, 2018
Priority date	Jan 3, 2018
Publication date	Feb 16, 2021
Grant date	Feb 16, 2021

Abstract

A method includes receiving one or more signals indicative of a position of a distal-end assembly of a medical probe within an organ of a patient. Based on the received signals, an inner volume that is confined within the distal-end assembly is determined. An anatomical map of the organ is updated, to denote the inner volume of the distal-end assembly as belonging to an interior of the organ.

First claim

The invention claimed is:

1. A method, comprising:
receiving one or more signals indicative of a position of a distal-end assembly of a medical probe within an organ of a patient;

based on the received signals, determining an inner volume that is confined within the distal-end assembly; and
updating an anatomical map of the organ to denote the inner volume of the distal-end assembly as belonging to an interior of the organ, wherein updating the anatomical map comprises verifying whether the distal-end assembly is deformed, and denoting the inner volume of the distal-end assembly as belonging to the interior of the organ only when the distal-end assembly is not deformed, and wherein, in response to detecting that the distal-end assembly is deformed, updating the anatomical map to denote only at least part of an external surface of the distal-end assembly as belonging to the interior of the organ.

2. The method according to claim 1 , wherein determining the inner volume comprises calculating, based on the received signals, positions of one or more sensors coupled to the distal-end assembly, and deriving the inner volume from the positions of the sensors.

3. The method according to claim 2 , wherein deriving the inner volume comprises calculating the inner volume based on the positions of the sensors and on a known geometrical shape of the distal-end assembly.

4. The method according to claim 1 , wherein verifying whether the distal-end assembly is deformed comprises verifying whether a surface associated with the distal-end assembly is planar.

5. The method according to claim 1 , wherein verifying whether the distal-end assembly is deformed comprises verifying whether an actual geometrical shape of the distal-end assembly deviates from a known un-deformed geometrical shape of the distal-end assembly.

6. The method according to claim 1 , wherein verifying whether the distal-end assembly is deformed comprises identifying mechanical contact between the distal-end assembly and a surface of the organ.

7. An apparatus, comprising:
an electrical interface; and
a processor, configured to:
receive via the electrical interface one or more signals indicative of a position of a distal-end assembly of a medical probe within an organ of a patient;
based on the received signals, determine an inner volume that is confined within the distal-end assembly; and
update an anatomical map of the organ to denote the inner volume of the distal-end assembly as belonging to an interior of the organ, wherein the processor is configured to verify whether the distal-end assembly is deformed, and to denote the inner volume of the distal-end assembly as belonging to the interior of the organ only when the distal-end assembly is not deformed, and wherein, in response to detecting that the distal-end assembly is deformed, the processor is configured to correspondingly update the anatomical map to denote only at least part of an external surface of the distal-end assembly as belonging to the interior of the organ.

8. The apparatus according to claim 7 , wherein the processor is configured to calculate, based on the received signals, positions of one or more sensors coupled to the distal-end assembly, and to derive the inner volume from the positions of the sensors.

9. The apparatus according to claim 8 , wherein the processor is configured to calculate the inner volume based on the positions of the sensors and on a known geometrical shape of the distal-end assembly.

10. The apparatus according to claim 7 , wherein the processor is configured to verify whether the distal-end assembly is deformed by verifying whether a surface associated with the distal-end assembly is planar.

11. The apparatus according to claim 7 , wherein the processor is configured to verify whether the distal-end assembly is deformed by verifying whether an actual geometrical shape of the distal-end assembly deviates from a known un-deformed geometrical shape of the distal-end assembly.

12. The apparatus according to claim 7 , wherein the processor is configured to verify whether the distal-end assembly is deformed by identifying mechanical contact between the distal-end assembly and a surface of the organ.

Assignees

• Biosense Webster Israel Ltd

Inventors

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

Classifications

• A61B2034/2061

  using shape-sensors, e.g. fiber shape sensors with Bragg gratings · CPC title

• A61B2034/105

  Modelling of the patient, e.g. for ligaments or bones · CPC title

• A61B5/743

  Displaying an image simultaneously with additional graphical information, e.g. symbols, charts, function plots · CPC title

• A61B5/7278

  Artificial waveform generation or derivation, e.g. synthesizing signals from measured signals · CPC title

• A61B5/6857

  with a distal pigtail shape · CPC title