System and method for determining path lengths through a body lumen

• US 7,865,229 B2
• Filed: 08/06/2009
• Issued: 01/04/2011
• Est. Priority Date: 06/30/2004
• Status: Active Grant

• Current Assignee: Given Imaging Limited (Medtronic Plc)
• Original Assignee: Given Imaging Limited (Medtronic Plc)
• Inventors: Horn, Eli
• Primary Examiner(s): Winakur; Eric F
• Assistant Examiner(s): Bor; Helene
• Application Number:
  US12/536,841
• Publication Number:
  US 20090292182A1
• Time in Patent Office: 516 Days
• Field of Search: 600/424, 600/117, 128/899
• US Class Current: 600/424
• CPC Class Codes: A61B 1/00156 using self propulsion
• CPC Class Codes: A61B 1/04 combined with photographic or television appliances
• CPC Class Codes: A61B 1/041 Capsule endoscopes for imaging
• CPC Class Codes: A61B 5/061 Determining position of a probe within the body employing means separate from the probe, e.g. sensing internal probe position employing impedance electrodes on the surface of the body A61B1/00158 takes precedence
• CPC Class Codes: A61B 5/064 using markers A61B5/062 takes precedence

Abstract

A system and method for determining the path length through a body lumen, for example to a specified location, is described. A location detection system may identify the location in space of an in-vivo device over time. A path-length detection unit may use data from the location detection system to determine a path traveled by an in-vivo device. A site of interest along that path may be identified. The distance of the site of interest from at least one end point of a body lumen may be determined.

Claims

1. A computer-implemented method for determining a path length from an end point of a body lumen to a site of interest in the body lumen, the method comprising the steps:

obtaining location data of a wireless in vivo device;

determining, using a processing unit, a raw path length value of the in vivo device between an end point of the body lumen and the site of interest, based upon the location data of the in vivo device;

determining a raw total lumen length value based upon the location data of the in vivo device;

calculating, using the processing unit, a relative path length value using a ratio between the raw path length value and the raw total lumen length value;

calculating, using the processing unit, an actual path length between the end point of the body lumen and the site of interest, using the relative path length value and a pre-selected overall lumen length value; and

displaying the actual path length value.

2. The method according to claim 1 wherein the end point of the body lumen is an entrance point or an exit point of the body lumen.

3. The method according to claim 2 wherein an end point of the body lumen is selected from the group consisting of:

pylorus and cecum.

4. The method according to claim 1 wherein the actual path length equals the product of the pre-selected overall lumen length value and the relative path length value.

5. The method according to claim 1 comprising selecting the end point which is closer to the location of the site of interest.

6. The method according to claim 1 wherein the body lumen is the small intestine, and wherein the pre-selected overall lumen length value is between 6 and 8 meters.

7. The method according to claim 1 further comprising determining the location of the end point of the body lumen based on data sensed by the in vivo device.

8. The method according to claim 1 comprising obtaining the location data of the in vivo device based on triangulation of signal strength received by antennas of an external receiving system.

9. The method according to claim 1 further comprising:

post-processing images sent from the in vivo device to identify end points of said body lumen; and

providing indication to the user if the site of interest may be revisited by an alternate device.

10. The method according to claim 9 further comprising providing indication to the user from which direction the site of interest may be revisited by the alternative device.

11. A computer-implemented method for determining a path length from an end point of a body lumen to a site of interest in the body lumen, the method comprising the steps:

obtaining location data of an autonomous in vivo device;

determining, using a processing unit, a raw path length value of the in vivo device between an end point of the body lumen and the site of interest, based upon the location data of the in vivo device;

determining a raw total lumen length value based upon the location data of the in vivo device;

calculating, using the processing unit, a ratio between a pre-selected overall lumen length value and the raw total lumen length value;

calculating, using the processing unit, an actual path length between the end point of the body lumen and the site of interest, by multiplying the raw path length value by said ratio; and

displaying the actual path length value and an identification of said end point of the body lumen.

12. The method according to claim 11 wherein the end point of the body lumen is an entrance point or an exit point of the body lumen.

13. The method according to claim 12 wherein an end point of the body lumen is selected from the group consisting of:

pylorus and cecum.

14. The method according to claim 12 comprising selecting the end point which is closer to the location of the site of interest, in order to determine a shorter raw path length value.

15. The method according to claim 11 wherein the body lumen is the small intestine, and wherein the pre-selected overall lumen length value is between 6 and 8 meters.

16. The method according to claim 11 further comprising determining the location of the end point of the body lumen based on image data.

17. The method according to claim 11 further comprising determining the location of the end point of the body lumen based on data sensed by the in vivo device.

18. The method according to claim 11 comprising obtaining the location data of the in vivo device based on triangulation of signal strength received by antennas of an external receiving system.