Guided Electrical Transcranial Stimulation (GETS) Technique

• US 20070043268A1
• Filed: 06/16/2006
• Published: 02/22/2007
• Est. Priority Date: 06/16/2005
• Status: Abandoned Application

• Current Assignee: Michael Russell
• Original Assignee: Michael Russell
• Inventors: Russell, Michael
• Application Number:
  US11/424,813
• Publication Number:
  US 20070043268A1
• Time in Patent Office: Days
• US Class Current: 600/300
• CPC Class Codes: A61B 5/055 involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging
• CPC Class Codes: A61B 6/501 for diagnosis of the head, e.g. neuroimaging or craniography
• CPC Class Codes: A61N 1/36017 with leads or electrodes penetrating the skin
• CPC Class Codes: A61N 1/36021 for treatment of pain
• CPC Class Codes: A61N 1/36025 for treating a mental or cerebral condition
• CPC Class Codes: A61N 1/3603 Control systems
• CPC Class Codes: A61N 2/006 for magnetic stimulation of nerve tissue

Abstract

An optimal transcranial or intracranial application of electrical energy for is determined for therapeutic treatment. MRI or CAT scan data, or both, are obtained for a subject brain. Different electrical resistance values are assigned to portions of the subject brain based on the data. Electrode sites are selected. Based on the assigning and selecting, one or more applied electrical inputs are calculated for optimal therapeutic application of transcranial or intracranial electricity.

Claims

1. A method of determining an optimal transcranial or intracranial, or other trans-tissue application of electrical energy for therapeutic treatment, comprising:

(a) obtaining MRI or CAT scan data, or both, of a subject brain or other body tissue;

(b) assigning different anisotropic electrical values to portions of the subject brain or other body tissue based on the data;

(c) selecting electrode sites; and

(d) calculating, based on the assigning and selecting, one or more applied electrical inputs for optimal therapeutic application of transcranial or intracranial or other trans-tissue electricity.

2. The method of claim 1, wherein the assigning comprises:

(i) segmenting the subject brain by defining tissue compartment boundaries between, and one or more electricalcharacteristics to, said portions of the subject brain;

(ii) implementing a finite element model by defining a mesh of grid elements for the subject brain; and

(iii) ascribing vector resistance values to each of the grid elements based on the segmenting.

3. The method of claim 2, wherein the electrical inputs comprise applied voltages, currents, energies, pulse shapes, pulse durations, pulse heights, or number of pulses per pulse train, or combinations thereof, and the electricity comprises current.

4. The method of claim 3, further comprising resolving peaks within respective gray scale data corresponding to two or more brain or other body tissues.

5. The method of claim 2, wherein the segmenting comprises discriminating two or more of the following organic brain substances:

cerebral spinal fluid, white matter, blood, skin, gray matter, soft tissue, cancellous bone and compact bone.

6. The method of claim 5, wherein the discriminating comprises resolving peaks within respective gray scale data corresponding to the two or more organic brain substances.

7. The method of claim 2, wherein the ascribing further comprises inferring anisotropies for the electrical values of the grid elements.

8. The method of claim 1, wherein the electrical values comprise resistivities, conductivities, capacitances, impedances, applied energies or charges, or combinations thereof.

9. The method of claim 1, wherein the electrical values comprise resistivities.

10. The method of claim 1, wherein the data comprises a combination of two or more types of MRI or CAT scan data, or both.

11. The method of claim 1, wherein the data comprises a combination of two of more of T1, T2 and PD MRI data.

12. The method of claim 1, wherein the data comprises three-dimensional data.

13. The method of claim 1, wherein the selecting comprises disposing the electrodes within the skull tissue.

14. The method of claim 1, wherein the selecting comprises disposing the electrodes through the skull proximate to or in contact with the dura.

15. The method of claim 1, wherein the selecting comprises disposing the electrodes in a shallow transdural location.

16. The method of claim 1, wherein the selecting comprises utilizing a screw mounted electrode within or through the skull tissue.

17. A method of determining an optimal transcranial or intracranial application of electrical energy for therapeutic treatment, comprising:

(a) obtaining a combination of two or more types of three-dimensional MRI or CAT scan data, or both, of a subject brain;

(b) assigning different electrical values to portions of the subject brain based on the data;

(c) selecting electrode sites including disposing at least one electrode at least partially through the skull; and

(d) calculating, based on the assigning and selecting, one or more applied electrical inputs for optimal therapeutic application of transcranial or intracranial electricity.

18. The method of claim 17, wherein the assigning comprises:

(i) segmenting the subject brain by defining tissue compartment boundaries between, and one or more anisotropic electrical resistance characteristics to, said portions of the subject brain;

(ii) implementing a finite element model by defining a mesh of grid elements for the subject brain; and

(iii) ascribing vector electrical values to each of the grid elements based on the segmenting.

19. The method of claim 17, wherein the electrical inputs comprise applied voltages, currents, energies, pulse shapes, pulse durations, pulse heights, or number of pulses per pulse train, or combinations thereof, and the electricity comprises current.

20. The method of claim 17, wherein the segmenting comprises discriminating two or more of the following organic brain substances:

cerebral spinal fluid, white matter, blood, skin, gray matter, soft tissue, cancellous bone and compact bone.

21. The method of claim 17, wherein the data comprises a combination of two of more of T1, T2, DT and PD MRI data.

22. The method of claim 17, wherein the selecting comprises disposing at least one electrode through the skull proximate to or in contact with the dura.

23. The method of claim 17, wherein the selecting comprises disposing at least one electrode in a shallow transdural location.

24. The method of claim 17, wherein the selecting comprises utilizing a screw mounted electrode within or through the skull tissue.

25. A method of determining an optimal transcranial or intracranial or other trans-tissue application of electrical energy for therapeutic treatment, comprising:

(a) obtaining MRI or CAT scan data, or both, of a subject brain or other body tissue;

(b) segmenting the subject brain by defining tissue compartment boundaries between, and one or more electrical characteristics to, said portions of the subject brain or other body tissue;

(c) implementing a finite element model by defining a mesh of grid elements for the subject brain or other body tissue;

(d) ascribing electrical values to each of the grid elements based on the segmenting;

(e) selecting electrode sites; and

(f) calculating, based on the ascribing and selecting, one or more applied electrical inputs for optimal therapeutic application of transcranial or intracranial or other trans-tissue current.

26. The method of claim 25, wherein the electrical values comprise vector resistance values and the electrical characteristics comprises anisotropies.

27. The method of claim 25, wherein the electrical inputs comprise applied voltages, currents, energies, pulse shapes, pulse durations, pulse heights, or number of pulses per pulse train, or combinations thereof.

28. The method of claim 25, wherein the segmenting comprises discriminating two or more of the following organic brain substances:

cerebral spinal fluid, white matter, blood, skin, gray matter, soft tissue, cancellous bone, eye fluid, cancerous tissue, inflammatory tissue, ischemic tissue and compact bone.

29. The method of claim 25, wherein the ascribing further comprises inferring anisotropies for the resistance values of the grid elements.

30. The method of claim 25, wherein the data comprises a combination of two or more types of MRI or CAT scan data, or both.

31. The method of claim 25, wherein the data comprises a combination of two of more of T1, T2, DT and PD MRI data.

32. The method of claim 25, wherein the data comprises three-dimensional data.

33. A method of determining an optimal transcranial or intracranial or other trans-tissue application of electrical energy for therapeutic treatment based on MRI or CAT scan data, or both, of a subject brain or other body tissue, and different anisotropic electrical values assigned to portions of the subject brain or other body tissue based on the data, the method comprising:

(a) selecting electrode sites; and

(b) calculating, based on the assigned anisotropic electrical values and the selecting, one or more applied electrical inputs for optimal therapeutic application of transcranial or intracranial or other trans-tissue current.

34. The method of claim 33, wherein the anisotropic values are assigned based on:

(i) segmenting the subject brain by defining tissue compartment boundaries between, and one or more electrical characteristics to, said portions of the subject brain;

(ii) implementing a finite element model by defining a mesh of grid elements for the subject brain; and

(iii) ascribing vector resistance values to each of the grid elements based on the segmenting.

35. The method of claim 34, wherein the segmenting comprises discriminating two or more of cerebral spinal fluid, white matter, blood, skin, gray matter, soft tissue, cancellous bone, eye fluid, cancerous tissue, inflammatory tissue, ischemic tissue, and compact bone.

36. The method of claim 35, wherein the discriminating comprises resolving peaks within respective gray scale data corresponding to two or more brain or other body tissues.

37. A method of determining an optimal transcranial or intracranial or other trans-tissue application of electrical energy for therapeutic treatment based on obtaining MRI or CAT scan data, or both, of a subject brain or other body tissue, and electrical values ascribed to grid elements of a mesh defined by implementing a finite element model for a subject brain or other body tissue, and by segmenting the subject brain or other body tissue by defining tissue compartment boundaries between, and one or more electrical characteristics to, said portions of the subject brain or other body tissue, and by implementing a finite element model by defining a mesh of grid elements for the subject brain, and ascribing electrical values to each of the grid elements based on the segmenting, the method comprising:

(a) selecting electrode sites; and

(b) calculating, based on the ascribed electrical values and selecting, one or more applied electrical values for optimal therapeutic application of transcranial or intracranial or other trans-tissue current.

38. The method of claim 37, wherein the electrical values comprise vector resistance values and the electrical characteristics comprises anisotropies.

39. The method of claim 37, wherein the segmenting comprises discriminating eye fluid and cerebral spinal fluid, or two or more of cerebral spinal fluid, white matter, blood, skin, gray matter, soft tissue, cancellous bone, eye fluid, cancerous tissue, inflammatory tissue, ischemic tissue, and compact bone.

40. The method of claim 37, wherein the ascribing further comprises inferring anisotropies for the resistance values of the grid elements.

41. One or more processor readable storage devices having processor readable code embodied thereon, said processor readable code for programming one or more processors to perform a method of determining an optimal transcranial or intracranial or other trans-tissue application of electrical energy for therapeutic treatment, the method comprising:

(a) obtaining MRI or CAT scan data, or both, of a subject brain or other body tissue;

(b) assigning different anisotropic electrical values to portions of the subject brain or other body tissue based on the data;

(c) selecting electrode sites; and

(d) calculating, based on the assigning and selecting, one or more applied electrical inputs for optimal therapeutic application of transcranial or intracranial or other trans-tissue electricity.

42. The one or more storage devices of claim 41, wherein the assigning comprises:

(i) segmenting the subject brain by defining tissue compartment boundaries between, and one or more electrical characteristics to, said portions of the subject brain;

(ii) implementing a finite element model by defining a mesh of grid elements for the subject brain; and

(iii) ascribing vector electrical values to each of the grid elements based on the segmenting.

43. The one or more storage devices of claim 42, wherein the electrical inputs comprise applied voltages, currents, energies, pulse shapes, pulse durations, pulse heights, or number of pulses per pulse train, or combinations thereof, and the electricity comprises current.

44. The one or more storage devices of claim 43, wherein the discriminating comprises resolving peaks within respective gray scale data corresponding to two or more brain or other body tissues.

45. The one or more storage devices of claim 43, wherein the segmenting comprises discriminating two or more of the following:

cerebral spinal fluid, white matter, blood, skin, gray matter, soft tissue, cancellous bone, eye fluid, cancerous tissue, inflammatory tissue, ischemic tissue and compact bone.

46. The one or more storage devices of claim 45, wherein the discriminating comprises resolving peaks within respective gray scale data corresponding to the two or more brain or other body tissues.

47. The one or more storage devices of claim 42, wherein the ascribing further comprises inferring anisotropies for the resistance values of the grid elements.

48. The one or more storage devices of claim 41, wherein the electrical values comprise conductivities, resistivities, capacitances, impedances, applied energies, power, charge, or combinations thereof.

49. The one or more storage devices of claim 41, wherein the electrical values comprise resistivities.

50. The one or more storage devices of claim 41, wherein the data comprises a combination of two or more types of MRI or CAT scan data, or both.

51. The one or more storage devices of claim 41, wherein the data comprises a combination of two of more of T1, T2, DT and PD MRI data.

52. The one or more storage devices of claim 41, wherein the data comprises three-dimensional data.

53. The one or more storage devices of claim 41, wherein the selecting comprises disposing the electrodes within the skull tissue.

54. The one or more storage devices of claim 41, wherein the selecting comprises disposing the electrodes through the skull proximate to or in contact with the dura.

55. The one or more storage devices of claim 41, wherein the selecting comprises disposing the electrodes in a shallow transdural location.

56. The one or more storage devices of claim 41, wherein the selecting comprises utilizing a screw mounted electrode within or through the skull tissue.

57. One or more processor readable storage devices having processor readable code embodied thereon, said processor readable code for programming one or more processors to perform a method of determining an optimal transcranial or intracranial application of electrical energy for therapeutic treatment, the method comprising:

(a) obtaining a combination of two or more types of three-dimensional MRI or CAT scan data, or both, of a subject brain;

(b) assigning different electrical values to portions of the subject brain based on the data;

(c) selecting electrode sites including disposing at least one electrode at least partially through the skull; and

(d) calculating, based on the assigning and selecting, one or more applied electrical inputs for optimal therapeutic application of transcranial or intracranial current.

58. The one or more storage devices of claim 57, wherein the assigning comprises:

(i) segmenting the subject brain by defining tissue compartment boundaries between, and one or more anisotropic electrical characteristics to, said portions of the subject brain;

(ii) implementing a finite element model by defining a mesh of grid elements for the subject brain; and

(iii) ascribing vector electrical values to each of the grid elements based on the segmenting.

59. The one or more storage devices of claim 57, wherein the electrical inputs comprise applied voltages, currents, energies, pulse shapes, pulse durations, pulse heights, or number of pulses per pulse train, or combinations thereof.

60. The one or more storage devices of claim 57, wherein the segmenting comprises discriminating two or more of the following:

cerebral spinal fluid, white matter, blood, skin, gray matter, soft tissue, cancellous bone, eye fluid, cancerous tissue, inflammatory tissue, ischemic tissue, and compact bone.

61. The one or more storage devices of claim 57, wherein the data comprises a combination of two of more of T1, T2, DT and PD MRI data.

62. The one or more storage devices of claim 57, wherein the selecting comprises disposing at least one electrode through the skull proximate to or in contact with the dura.

63. The one or more storage devices of claim 57, wherein the selecting comprises disposing at least one electrode in a shallow transdural location.

64. The one or more storage devices of claim 57, wherein the selecting comprises utilizing a screw mounted electrode within or through the skull tissue.

65. One or more processor readable storage devices having processor readable code embodied thereon, said processor readable code for programming one or more processors to perform a method of determining an optimal transcranial or intracranial or other trans-tissue application of electrical energy for therapeutic treatment, the method comprising:

(a) obtaining MRI or CAT scan data, or both, of a subject brain or other body tissue;

(b) segmenting the subject brain or other body tissue by defining tissue compartment boundaries between, and one or more electrical characteristics to, said portions of the subject brain or other body tissue;

(c) implementing a finite element model by defining a mesh of grid elements for the subject brain or other body tissue;

(d) ascribing electrical values to each of the grid elements based on the segmenting;

(e) selecting electrode sites; and

(f) calculating, based on the assigning and selecting, one or more applied electrical inputs for optimal therapeutic application of transcranial or intracranial or other trans-tissue current.

66. The one or more storage devices of claim 65, wherein the electrical values comprise vector resistance values and the electrical characteristics comprises anisotropies.

67. The one or more storage devices of claim 65, wherein the electrical inputs comprise applied voltages, currents, energies, pulse shapes, pulse durations, pulse heights, or number of pulses per pulse train, or combinations thereof.

68. The one or more storage devices of claim 65, wherein the segmenting comprises discriminating two or more of the following:

cerebral spinal fluid, white matter, blood, skin, gray matter, soft tissue, cancellous bone, eye fluid, cancerous tissue, inflammatory tissue, ischemic tissue, and compact bone.

69. The one or more storage devices of claim 65, wherein the ascribing further comprises inferring anisotropies for the resistance values of the grid elements.

70. The one or more storage devices of claim 65, wherein the data comprises a combination of two or more types of MRI or CAT scan data, or both.

71. The one or more storage devices of claim 65, wherein the data comprises a combination of two of more of T1, T2, DT and PD MRI data.

72. The one or more storage devices of claim 65, wherein the data comprises three-dimensional data.

73. One or more processor readable storage devices having processor readable code embodied thereon, said processor readable code for programming one or more processors to perform a method of determining an optimal transcranial or intracranial or other trans-tissue application of electrical energy for therapeutic treatment based on MRI or CAT scan data, or both, of a subject brain or other body tissue, and different anisotropic electrical values assigned to portions of the subject brain or other body tissue based on the data, the method comprising:

(a) selecting electrode sites; and

(b) calculating, based on the assigned anisotropic values and the selecting, one or more applied electrical inputs for optimal therapeutic application of transcranial or intracranial or other trans-tissue current.

74. The one or more storage devices of claim 73, wherein the anisotropic values are assigned based on:

(i) segmenting the subject brain by defining tissue compartment boundaries between, and one or more electrical characteristics to, said portions of the subject brain;

(ii) implementing a finite element model by defining a mesh of grid elements for the subject brain; and

(iii) ascribing vector electrical values to each of the grid elements based on the segmenting.

75. The one or more storage devices of claim 74, wherein the segmenting comprises discriminating two or more of cerebral spinal fluid, white matter, blood, skin, gray matter, soft tissue, cancellous bone, eye fluid, cancerous tissue, inflammatory tissue, ischemic tissue, and compact bone.

76. The one or more storage devices of claim 75, wherein the discriminating comprises resolving peaks within respective gray scale data corresponding to the two or more brain or other body tissues.

77. One or more processor readable storage devices having processor readable code embodied thereon, said processor readable code for programming one or more processors to perform a method of determining an optimal transcranial or intracranial or other trans-tissue application of electrical energy for therapeutic treatment based on obtaining MRI or CAT scan data, or both, of a subject brain or other body tissue, and electrical values ascribed to grid elements of a mesh defined by implementing a finite element model for a subject brain or other body tissue, and by segmenting the subject brain or other body tissue by defining tissue compartment boundaries between, and one or more electrical characteristics to, said portions of the subject brain or other body tissue, and by implementing a finite element model by defining a mesh of grid elements for the subject brain or other body tissue, and ascribing electrical values to each of the grid elements based on the segmenting, the method comprising:

(a) selecting electrode sites; and

(b) calculating, based on the ascribed electrical values and selecting, one or more applied electrical inputs for optimal therapeutic application of transcranial or intracranial or other trans-tissue current.

78. The one or more storage devices of claim 77, wherein the electrical values comprise vector resistance values and the electrical characteristics comprises anisotropies.

79. The one or more storage devices of claim 77, wherein the segmenting comprises discriminating two or more of cerebral spinal fluid, white matter, blood, skin, gray matter, soft tissue, cancellous bone, eye fluid, cancerous tissue, inflammatory tissue, ischemic tissue, and compact bone.

80. The one or more storage devices of claim 77, wherein the ascribing further comprises inferring anisotropies for the electrical values of the grid elements.