SYSTEM AND METHOD OF MONITORING THE OPERATION OF A MEDICAL DEVICE

• US 20070195922A1
• Filed: 07/21/2006
• Published: 08/23/2007
• Est. Priority Date: 07/22/2005
• Status: Abandoned Application

• Current Assignee: TomoTherapy Incorporated (Accuray Incorporated)
• Original Assignee: TomoTherapy Incorporated (Accuray Incorporated)
• Inventors: Mackie, Thomas, Schloesser, Eric, Ruchala, Kenneth, Olivera, Gustavo
• Application Number:
  US11/459,086
• Publication Number:
  US 20070195922A1
• Time in Patent Office: Days
• US Class Current: 378/4
• CPC Class Codes: A61B 6/032 Transmission computed tomography [CT]
• CPC Class Codes: A61N 2005/1072 taking into account movement of the target
• CPC Class Codes: A61N 5/1042 with spatial modulation of the radiation beam within the treatment head
• CPC Class Codes: A61N 5/1049 for verifying the position of the patient with respect to the radiation beam
• CPC Class Codes: G21K 1/04 using variable diaphragms, shutters, choppers
• CPC Class Codes: G21K 1/046 varying the contour of the field, e.g. multileaf collimators

Abstract

A system for monitoring the operation of a medical device including a movable portion and a controller for controlling the movable portion. The system includes a motion verification device directly coupled to the movable portion. The system is configured to determine motion data for the motion verification device. In one method of operation, the method includes moving the movable portion, determining motion data for the motion verification device, and monitoring the motion data.

Claims

1. A system for monitoring the operation of a medical device including a movable portion and a controller for controlling the movable portion, the system comprising:

a motion verification device directly coupled to the movable portion; and

wherein the system is configured to determine motion data for the motion verification device.

2. A system as set forth in claim 1 wherein the movable portion includes a radiation source.

3. A system as set forth in claim 1 wherein the medical device includes a radiation source having the movable portion.

4. A system as set forth in claim 1 wherein the movable portion includes at least one of a gantry, a couch, a radiation modulation device, and a detector.

5. A system as set forth in claim 1 wherein the motion data includes at least one of relative position data, absolute position data, relative velocity data, absolute velocity data, relative acceleration data, absolute acceleration data, and time series data.

6. A system as set forth in claim 1 wherein the controller controls the movable apparatus based at least in part on the motion data.

7. A system as set forth in claim 1, further comprising a second motion verification device directly coupled to the movable portion, wherein the system is further configured to determine second motion data for the second motion verification device.

8. A system as set forth in claim 7 wherein the second motion data includes at least one of relative position data between the second motion verification device and the first motion verification device, relative velocity data between the second motion verification device and the first motion verification device, relative acceleration data between the second motion verification device and the first motion verification device, and time series data between the second motion verification device and the first motion verification device.

9. A system as set forth in claim 7 wherein the second motion verification device is directly coupled to the movable portion.

10. A system as set forth in claim 7 wherein the medical device further includes a second movable portion, and wherein the second motion verification device is directly coupled to the second movable portion.

11. A system as set forth in claim 10 wherein the medical device further includes a second controller for controlling the second movable portion, and wherein the second controller controls the movable apparatus based at least in part on the second motion data.

12. A system as set forth in claim 1, further comprising a system monitoring module in communication with the motion verification device, and wherein the system monitoring module is configured to determine the motion data for the motion verification device.

13. A system as set forth in claim 12 wherein the communication between the system monitoring module and the motion verification device includes a wireless communication.

14. A system as set forth in claim 12 wherein the system further includes a second motion verification device directly coupled to the movable portion, wherein the system monitoring module is further configured to determine second motion data for the second motion verification device.

15. A system as set forth in claim 12 wherein the medical device includes a second movable portion and a second controller for controlling the second movable portion, wherein the system further includes a second motion verification device directly coupled to the second movable portion, and wherein the system monitoring module is further configured to determine second motion data for the second motion verification device.

16. A system as set forth in claim 15, further comprising an integration computer in communication with the first controller and the second controller, wherein the system monitoring module is in communication with the integration computer, and wherein the system monitoring module communicates the motion data to the integration computer.

17. A system as set forth in claim 12 wherein the system monitoring module is in communication with the controller, and wherein the system monitoring module communicates the motion data to the controller.

18. A system as set forth in claim 1 wherein system is adapted to be in communication with a second motion verification device associated with a patient receiving radiation, wherein the system is further configured to determine motion data for the second motion verification device.

19. A system as set forth in claim 18 wherein the second motion data includes at least one of relative position data between the second motion verification device and the first motion verification device, relative velocity data between the second motion verification device and the first motion verification device, relative acceleration data between the second motion verification device and the first motion verification device, and time series data between the second motion verification device and the first motion verification device.

20. A system as set forth in claim 18 wherein the second motion verification device includes at least one of a reflector marker, a radio-frequency marker, a transmitter marker, a variable intensity marker, a variable frequency marker, and a transistor marker.

21. A system as set forth in claim 18 wherein the medical device further includes a second controller configured to control radiation delivered by a radiation source, wherein the second motion verification device is further configured to sense a parameter related to radiation received by the second motion verification device, and wherein the system is further configured to receive data related to the radiation parameter.

22. A system as set forth in claim 21, further comprising a system monitoring module in communication with the first motion verification device and the second motion verification device, and wherein the system monitoring module is configured to determine the motion data for the first motion verification device, determine the motion data for the second motion verification device, and determine the data related to the radiation parameter.

23. A system as set forth in claim 22 wherein the first motion verification device is further configured to sense a parameter related to a radiation received by the first motion verification device, and wherein the system monitoring module is further configured to receive data related to the radiation parameter received by the first motion verification device.

24. A system as set forth in claim 1 and further comprising a position sensor coupled to the controller and configured to sense a position of the movable portion.

25. A system as set forth in claim 1 wherein the motion verification device includes at least one of a reflector marker, a radio-frequency marker, a transmitter marker, a variable intensity marker, a variable frequency marker, and a transistor marker.

26. A method of monitoring the operation of a medical device having a movable portion, a controller for controlling the movable portion, and a motion verification device directly coupled to the movable portion, the method comprising:

moving the movable portion;

determining motion data for the motion verification device; and

monitoring the motion data.

27. A method as set forth in claim 26 and further comprising

acquiring a motion signal with a motion sensor for the movable portion, the motion sensor being distinct from the motion verification device;

obtaining data related to the motion signal;

obtaining data related to the motion verification device from the monitored motion data; and

comparing the data of the motion signal with the data of the motion verification device.

28. A method as set forth in claim 27 and further comprising determining if the movable portion is in an intended location based on the comparison.

29. A method as set forth in claim 27 and further comprising determining if the motion sensor is properly synchronized with the motion verification device based on the comparison.

30. A method as set forth in claim 29 and further comprising generating a signal if the motion sensor is not properly synchronized with the motion verification device.

31. A method as set forth in claim 29 and further comprising correcting the signal of the motion sensor if the position sensor is not properly synchronized with the motion verification device.

32. A method as set forth in claim 26 determining if the movable portion is in an intended location based at least in part on the monitored motion data.

33. A method as set forth in claim 32 wherein the determining act includes comparing the motion data with the intended location.

34. A method as set forth in claim 32 and further comprising generating a signal if the movable portion is not in the intended location.

35. A method as set forth in claim 32 and further comprising further moving the movable portion if the movable portion is not in the proper location.

36. A method as set forth in claim 26 wherein the motion data includes at least one of relative position data, absolute position data, relative velocity data, absolute velocity data, relative acceleration data, absolute acceleration data, and time series data.

37. A method as set forth in claim 26 wherein the medical device further includes a second motion verification device directly coupled to the movable portion, and wherein the method further comprises

determining second motion data for the second motion verification device;

and

monitoring the second motion data.

38. A method as set forth in claim 37 wherein the second motion data includes at least one of relative position data between the second motion verification device and the first motion verification device, relative velocity data between the second motion verification device and the first motion verification device, relative acceleration data between the second motion verification device and the first motion verification device, and time series data between the second motion verification device and the first motion verification device.

39. A method as set forth in claim 26 wherein the medical device further includes a second movable portion and a second motion verification device directly coupled to the second movable portion, and wherein the method further comprises

determining second motion data for the second motion verification device;

and

monitoring the second motion data.

40. A method as set forth in claim 39 wherein the second motion data includes at least one of relative position data between the second motion verification device and the first motion verification device, relative velocity data between the second motion verification device and the first motion verification device, relative acceleration data between the second motion verification device and the first motion verification device, and time series data between the second motion verification device and the first motion verification device.

41. A method as set forth in claim 26 wherein the medical device is adapted to be in communication with a second motion verification device associated with a patient receiving radiation, and wherein the method further comprises

determining second motion data for the second motion verification device;

and

monitoring the second motion data.

42. A method as set forth in claim 41 wherein the second motion data includes at least one of relative position data between the second motion verification device and the first motion verification device, relative velocity data between the second motion verification device and the first motion verification device, relative acceleration data between the second motion verification device and the first motion verification device, and time series data between the second motion verification device and the first motion verification device.

43. A method as set forth in claim 41 wherein the second motion verification device includes at least one of a reflector marker, a radio-frequency marker, a transmitter marker, a variable intensity marker, a variable frequency marker, and a transistor marker.

44. A method as set forth in claim 41 and further comprising delivering radiation to the patient, determining radiation-related data for the second motion verification device, and monitoring the radiation-related data.

45. A method as set forth in claim 44 and further comprising determining second radiation-related data for the first motion verification device, and monitoring the second radiation-related data.

46. A method as set forth in claim 45 and further comprising comparing the first radiation-related data with the second radiation-related data.

47. A method as set forth in claim 26 wherein the motion verification device includes at least one of a reflector marker, a radio-frequency marker, a transmitter marker, a variable intensity marker, a variable frequency marker, and a transistor marker.