Method for automated localization of lesions in the gastrointestinal tract for treatment using laser light from an endorobot

• US 20050096712A1
• Filed: 10/06/2004
• Published: 05/05/2005
• Est. Priority Date: 10/06/2003
• Status: Active Grant

• Current Assignee: Siemens Healthcare GMBH (Siemens AG)
• Original Assignee: Siemens AG
• Inventors: Abraham-Fuchs, Klaus, Fuchs, Friedrich, Kuth, Rainer
• Granted Patent: US 7,572,284 B2
• Time in Patent Office: Days
• US Class Current: 607/89
• CPC Class Codes: A61B 1/00016 using wireless means
• CPC Class Codes: A61B 1/00158 using magnetic field
• CPC Class Codes: A61B 1/041 Capsule endoscopes for imaging
• CPC Class Codes: A61B 18/20 using laser
• CPC Class Codes: A61B 34/72 Micromanipulators
• CPC Class Codes: A61B 34/73 Manipulators for magnetic surgery
• CPC Class Codes: A61B 5/0031 Implanted circuitry
• CPC Class Codes: A61B 5/07 Endoradiosondes
• CPC Class Codes: A61B 5/4255 Intestines, colon or appendix

Abstract

A method is for automated localization of lesions in the gastrointestinal tract using laser light from an endorobot. The method includes recording of surface images of the gastrointestinal tract using the camera of the endorobot. Next, the surface images are transmitted to a computer. The surface images are then analyzed by the computer on the basis of lesion-specific features with regard to lesions to be irradiated. Thereafter, control signals are computed by the computer on the basis of a detected lesion, and the control signals are transmitted to an endorobot steering device and/or to a laser system located in the endorobot. Finally, the computed laser-beam orientation and size of the laser irradiation area are adjusted by the endorobot steering device and/or by the laser system, on the basis of the control signals.

Claims

1. A method for automated localization of lesions in the gastrointestinal tract for treatment using laser light from an endorobot, comprising:

recording surface images of the gastrointestinal tract using a camera of the endorobot;

transmitting the surface images to a computer;

analyzing the surface images on the basis of lesion-specific features with regard to lesions to be irradiated;

computing control signals on the basis of a detected lesion;

transmitting the control signals to at least one of an endorobot steering device and a laser system located in the endorobot; and

adjusting a computed laser-beam orientation and size of the laser irradiation area by at least one of the endorobot steering device and the laser system, on the basis of the control signals.

2. The method as claimed in claim 1, wherein a controlled irradiation of the detected lesion is performed comprising:

irradiating, using the laser of the endorobot, the lesion detected by the computer on the basis of lesion-specific features;

measuring current lesion-specific features of the irradiated area by the camera, after switching off the laser;

calculating the size of the laser irradiation area, using the computer, on the basis of the measured current lesion-specific features;

setting up the calculated size of the laser irradiation area by positioning the endorobot orthogonally to the lesion surface;

irradiating, continuous or pulsed, the lesion surface, measuring and monitoring of the size and the current lesion-specific features of the laser irradiation area on the lesion surface.

3. The method as claimed in claim 1, wherein the size of the laser irradiation area is varied as a function of the measured current lesion-specific features of the laser irradiation area on the lesion surface by adjusting the distance of the endorobot from the lesion surface.

4. The method as claimed in claim 1, wherein the size of the laser irradiation area is varied as a function of the measured current lesion-specific features of the laser irradiation area on the lesion surface by varying the laser system.

5. The method as claimed in claim 1, wherein the lesion-specific features concern the color, the shape and the texture of a specific lesion.

6. The method as claimed in claim 1, wherein the lesion-specific features are compared with lesion features in a library at least one of accessible to the computer and in the computer.

7. The method as claimed in claim 1, wherein the irradiation with laser light is at least one of interruptable and stoppable at at least one of any time and at periodic intervals, in order to measure the size of the laser irradiation area and to measure the lesion-specific features.

8. The method as claimed in claim 1, wherein the recording of surface images, the transmission to the computer and the analysis by the computer are advantageously performed continuously.

9. The method as claimed in claim 1, wherein the whole lesion surface is irradiated with a defined surface power density of the laser by at least one of transverse displacement of the laser beam in the XY-plane and by tilting the laser beam relative to the lesion-endorobot connecting line by suitable movement of the endorobot in combination with the supervised positioning in the Z-direction of the endorobot.

10. The method as claimed in claim 9, wherein the surface power density is defined by the computer over time as a function of the type of the lesion.

11. The method as claimed in claim 8, wherein at least one of the transverse displacement of the laser beam in the XY-plane and the tilting of the laser beam relative to the Z-axis is performed by three-dimensional orientation of the laser relative to the endorobot.

12. The method as claimed in claim 11, wherein the three-dimensional orientation of the laser relative to the endorobot is performed by miniaturized electromechanical mechanisms.

13. The method as claimed in claim 11, wherein the movement of the laser beam is effected by moving a screen.

14. The method as claimed in claim 11, wherein the movement of the laser beam is effected by actuating selected laser diodes of a 3 D laser diode array integrated in the endorobot.

15. The method as claimed in claim 11, wherein the movement of the laser beam is effected by a magnetic-field steering system, in which the laser integrated in the endorobot is coupled to at least one of a movable miniature magnet and magnetizable material that is not used for navigation of the endorobot and that can be at least one of tilted and displaced by applying an external magnetic field.

16. The method as claimed in claim 11, wherein an orientation of additional components of the endorobot is performed.

17. A system for implementing a method as claimed in claim 1.

18. The system as claimed in claim 17, wherein the computer is located outside the patient under examination.

19. The system as claimed in claim 17, wherein the computer is integrated inside the endorobot.

20. The method as claimed in claim 2, wherein the size of the laser irradiation area is varied as a function of the measured current lesion-specific features of the laser irradiation area on the lesion surface by adjusting the distance of the endorobot from the lesion surface.

21. The method as claimed in claim 9, wherein at least one of the transverse displacement of the laser beam in the XY-plane and the tilting of the laser beam relative to the Z-axis is performed by three-dimensional orientation of the laser relative to the endorobot.

22. The method as claimed in claim 10, wherein at least one of the transverse displacement of the laser beam in the XY-plane and the tilting of the laser beam relative to the Z-axis is performed by three-dimensional orientation of the laser relative to the endorobot.

23. The method as claimed in claim 12, wherein the miniaturized electromechanical mechanisms include at least one of movable membranes, shape memory alloys, electrically contractile polymers, and piezo-actuators.

24. The method as claimed in claim 12, wherein an orientation of additional components of the endorobot is performed.

25. A system for implementing a method as claimed in claim 2.

26. The system as claimed in claim 25, wherein the computer is located outside the patient under examination.

27. The system as claimed in claim 25, wherein the computer is integrated inside the endorobot.

28. A system for automated localization of lesions in the gastrointestinal tract using laser light from an endorobot, the endorobot recording surface images of the gastrointestinal tract, comprising:

means for transmitting the recorded surface images;

means for analyzing the surface images on the basis of lesion-specific features with regard to lesions to be irradiated and for computing control signals on the basis of a detected lesion;

means for transmitting the control signals to a device located in the endorobot; and

means for adjusting a computed laser-beam orientation and size of a laser irradiation area on the basis of the control signals.

29. The system of claim 28, wherein the means for analyzing and for computing includes a computer device.

30. The system as claimed in claim 29, wherein the computer device is located outside the patient under examination.

31. The system as claimed in claim 29, wherein the computer device is integrated inside the endorobot.