Three-dimensional reconstruction of intrabody organs

• US 6,456,867 B2
• Filed: 02/21/2001
• Issued: 09/24/2002
• Est. Priority Date: 07/24/1998
• Status: Expired due to Term

• Current Assignee: Biosense, Inc. (Cardinal Health, Inc.)
• Original Assignee: Biosense, Inc. (Cardinal Health, Inc.)
• Inventors: Reisfeld, Daniel
• Primary Examiner(s): Lateef, Marvin M.
• Assistant Examiner(s): Lin, Jeoyuh
• Application Number:
  US09/789,427
• Publication Number:
  US 20010009974A1
• Time in Patent Office: 580 Days
• Field of Search: 128/920, 128/923, 128/848, 128/899, 382/128, 382/154, 600/416, 600/424, 600/473, 600/474, 600/371, 600/372-374, 600/380-384, 600/407, 600/417, 600/481, 600/425
• US Class Current: 600/407
• CPC Class Codes: A61B 2562/17 Comprising radiolucent components
• CPC Class Codes: A61B 5/282 Holders for multiple electrodes for introduction into the body A61B5/287
• CPC Class Codes: A61B 5/341 Vectorcardiography [VCG]
• CPC Class Codes: G06T 17/20 Finite element generation, e.g. wire-frame surface description, tesselation
• CPC Class Codes: G06T 2210/41 Medical

Abstract

A method of reconstructing a map of a volume, including determining coordinates of a plurality of locations on a surface of the volume having a configuration, generating a grid of points defining a reconstruction surface in 3D space in proximity to the determined locations, for each of the points on the grid, defining a respective vector, dependent on a displacement between one or more of the points on the grid and one or more of the locations, and adjusting the reconstruction surface by moving substantially each of the points on the grid responsive to the respective vector, so that the reconstruction surface is deformed to resemble the configuration of the surface.

Claims

1. A method of displaying values of a parameter which varies over a surface of a portion of the human body, comprising:

determining a value of the parameter at each of a plurality of points on the surface of the body; and

rendering an image of the surface to a display with a varying amount of transparency on different areas of the surface, responsive in each of the areas of the surface to the confidence value of the parameter at one or more points in the area.

2. A method according to claim 1, wherein determining the value comprises sampling a plurality of points and creating a map of the surface responsive thereto, and wherein rendering the image comprises rendering a graphic representation of the map.

3. A method according to claim 2, wherein the plurality of points comprises sampled points and interpolated points, and further comprising the value comprises determining a measure of reliability of the map in each of the areas;

wherein determining the measure of reliability comprises assigning measures of reliability to the interpolated points according to their respective distance from a closest sampled point.

4. A method according to claim 1, wherein rendering the image comprises rendering one or more of the areas having a low measure of reliability relative to another one or more of the areas with a relatively greater degree of transparency.