Method and means for calculating electrode frequency allocation
First Claim
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1. An apparatus for configuring a frequency range to electrode map disposed in a data storage of a cochlear implant prosthesis, the frequency range to electrode map containing frequency range to electrode mapping data, comprising:
- a) processing means for processing electrode location data, the electrode location data describing the location of at least two electrodes relative to a cochlea, the electrodes being components of an electrode array, the processing means generating characteristic frequency data and being adapted to determine from said characteristic frequency data said frequency range to electrode map to relate a characteristic frequency to each electrode;
b) input means for conveying the electrode location data to the processing means;
c) interface means for transferring the frequency range to electrode map to the data storage;
wherein the processing means generates the characteristic frequency data according to a characteristic frequency model, wherein the characteristic frequency data includes characteristic frequencies of electrodes of the electrode array, the characteristic frequency of an electrode corresponding to the estimated frequency of maximal displacement of the basilar membrane of the cochlea, according to the characteristic frequency model, at the location of said electrode of the electrode array.
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Abstract
There is provided a system for predicting the characteristic frequency of each electrode of an implanted cochlear electrode array from electrode position data contained in an image of the implanted cochlea. There is also provided a system for setting the frequency range to electrode map of a cochlear prosthesis.
45 Citations
18 Claims
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1. An apparatus for configuring a frequency range to electrode map disposed in a data storage of a cochlear implant prosthesis, the frequency range to electrode map containing frequency range to electrode mapping data, comprising:
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a) processing means for processing electrode location data, the electrode location data describing the location of at least two electrodes relative to a cochlea, the electrodes being components of an electrode array, the processing means generating characteristic frequency data and being adapted to determine from said characteristic frequency data said frequency range to electrode map to relate a characteristic frequency to each electrode; b) input means for conveying the electrode location data to the processing means; c) interface means for transferring the frequency range to electrode map to the data storage; wherein the processing means generates the characteristic frequency data according to a characteristic frequency model, wherein the characteristic frequency data includes characteristic frequencies of electrodes of the electrode array, the characteristic frequency of an electrode corresponding to the estimated frequency of maximal displacement of the basilar membrane of the cochlea, according to the characteristic frequency model, at the location of said electrode of the electrode array. - View Dependent Claims (2, 3, 4, 5)
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6. A method for setting a frequency range to electrode map of a cochlear implant prosthesis including the steps of:
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a) determining two fitting values by reference to an implanted electrode array the electrode array being implanted within a cochlea; b) matching a template cochlear spiral to said electrode array according to the fitting values; c) determining the position of each electrode of said electrode array relative to the cochlea from the template cochlear spiral and known dimensions of the type of implanted array; d) calculating a characteristic frequency for each electrode from the position of each electrode relative to the cochlea according to a mathematical model of the characteristic frequency characteristics of a cochlea for each of the electrodes; e) setting the frequency range to electrode map of the cochlear implant prosthesis on the basis of the characteristic frequencies calculated in the previous step. - View Dependent Claims (7, 8, 9, 10)
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- 11. A product for determining characteristic frequency for electrodes in an implanted intracochlear electrode array based on an diagnostic medical image, said product being provided with inputs including for a given implanted array a first value being the number of electrodes extending outside the round window, and a second value being the number of electrodes extending from the round window to the most apical of a set of geometrically defined points on the diagnostic medical image to which the image of the array extends, means for identifying the most apical of said points, said product including means for determining the position of the implanted electrodes by reference to a predefined reference shape and predefined dimensions of the electrode array, means for mapping said electrode positions to corresponding characteristic frequencies, and means for outputting a set comprising characteristic frequencies for each electrode.
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15. An apparatus for configuring a cochlear implant having an electrode array formed of at least two electrodes and a data storage containing a frequency range to electrode map relating a characteristic frequency to each of said electrodes, said apparatus comprising:
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an input arranged to receive location data indicative of the location of said electrodes within the cochlea of a patient; a data processor coupled to said input to receive said location data, said data processor being arranged and constructed to generate said map from said location data in accordance with a characteristic frequency model which relates the characteristic frequency of any electrode to an estimated frequency of a maximal displacement of the basilar membrane at the location of that electrode; and an interface coupled between said data processor and said data storage to transfer said map to said data storage. - View Dependent Claims (16, 17, 18)
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Specification