Apparatus and method for topographic display of multichannel EEG data
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Abstract
In a system for displaying multichannel EEG data, data values received from a matrix of EEG electrodes are stored in a random access memory. Digital values to be displayed are interpolated from the input values by addressing selected ones of the inputs from memory, multiplying those inputs by predetermined coefficients taken from a coefficient memory and summing the products. Each element of the display can be determined in that way within one frame time of the display apparatus. The data can be interpolated in real time for a flicker free display at a rate of over 25 frames per second. By displaying separate values associated with each display element as a distinct color, the dimensionality of the display can be increased. The numeric matrix which underlies the expanded topographic display can be stored digitally and further utilized in further operations and displays.
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Current AssigneeNicolet Instrument Corporation (Thermo Fisher Scientific Incorporated)
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Original AssigneeNicolet Instrument Corporation (Thermo Fisher Scientific Incorporated)
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InventorsCulver, Norman D.
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Primary Examiner(s)Kamm, William E.
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Application NumberUS07/663,070Time in Patent Office943 DaysField of Search128/731US Class Current600/544CPC Class CodesA61B 5/0476 Electroencephalography devi...A61B 5/742 using visual displays A61B5...
