Brain-contact for sensing epileptogenic foci with improved accuracy
First Claim
1. In an electrical brain-contact device for sensing and mapping electrical epileptogenic discharges within the brain of the type having a dielectric base member and an array of electrical sensing contacts mounted thereon in spaced fashion with separate leads extending therefrom, the improvement comprising a radiopaque dielectric material adjacent to at least one of the sensing contacts whereby the intracranial positions of the sensing contacts of the array may readily be determined by x-ray without effect on the electrical sensing qualities of the sensing contacts.
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Abstract
An improved electrical brain-contact device for increased accuracy in determining epileptogenic foci. The intracranial device has a dielectric base member and an array of contacts mounted thereon with separate leads extending therefrom, and is characterized by radiopaque dielectric means adjacent to at least one of the contacts such that the positions of the contacts of the array may more readily be determined by x-ray. Certain preferred forms have discrete radiopaque dielectric markers in various arrangements, including sub-arrays of markers corresponding in number and positions to subsets of the contacts.
166 Citations
20 Claims
- 1. In an electrical brain-contact device for sensing and mapping electrical epileptogenic discharges within the brain of the type having a dielectric base member and an array of electrical sensing contacts mounted thereon in spaced fashion with separate leads extending therefrom, the improvement comprising a radiopaque dielectric material adjacent to at least one of the sensing contacts whereby the intracranial positions of the sensing contacts of the array may readily be determined by x-ray without effect on the electrical sensing qualities of the sensing contacts.
- 18. In an electrical brain-contact device of the type having a substantially flat flexible dielectric base member with first and second layers and an array of substantially flat contacts sandwiched between the first and second layers in spaced fashion with separate leads extending therefrom, the first layer having openings aligned with the contacts, the improvement comprising at least one discrete substantially flat radiopaque dielectric marking piece held between the second layer and at least one of the contacts, whereby the intracranial positions of the contacts of the array may readily be determined by x-ray.
Specification