IMPLANTABLE MEDICAL DEVICE WITH ADAPTIVE SIGNAL PROCESSING AND ARTIFACT CANCELLATION
First Claim
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1. A medical device, comprising:
- a light source emitting light at a plurality of wavelengths within body tissue adjacent to the light source;
a detector detecting the emitted light scattered by the adjacent tissue and generating a corresponding detected light signal;
a signal conditioning module separating the detected light signal into a multi-dimensional signal, each of the dimensions of the multi-dimensional signal corresponding to scattered light received at a wavelength of the plurality of wavelengths;
a digital signal processor performing principal component analysis in response to the multi-dimensional signal to generate corresponding signal data; and
a controller generating one of a therapy control signal and a diagnostic output signal in response to the signal data.
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Abstract
A medical device includes one or more sensors used to acquire a multi-dimensional signal. In one embodiment, principal component analysis is performed on the multi-dimensional signal to produce signal data. The principal component analysis results are used to cancel signal artifact in one embodiment. A medical device controller produces one of a therapy control and a diagnostic output in response to the signal data.
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Citations
20 Claims
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1. A medical device, comprising:
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a light source emitting light at a plurality of wavelengths within body tissue adjacent to the light source; a detector detecting the emitted light scattered by the adjacent tissue and generating a corresponding detected light signal; a signal conditioning module separating the detected light signal into a multi-dimensional signal, each of the dimensions of the multi-dimensional signal corresponding to scattered light received at a wavelength of the plurality of wavelengths; a digital signal processor performing principal component analysis in response to the multi-dimensional signal to generate corresponding signal data; and a controller generating one of a therapy control signal and a diagnostic output signal in response to the signal data. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of generating a signal in a medical device, comprising:
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emitting light at a plurality of wavelengths within body tissue; detecting the emitted light scattered by the tissue and generating a corresponding detected light signal; separating the detected light signal into a multi-dimensional signal, each of the dimensions of the multi-dimensional signal corresponding to scattered light received at a wavelength of the plurality of wavelengths; performing principal component analysis in response to the multi-dimensional signal to generate corresponding signal data; and generating one of a therapy control signal and a diagnostic output signal in response to the signal data. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A computer readable medium having computer executable instructions for performing a method comprising:
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emitting light at a plurality of wavelengths within body tissue; detecting the emitted light scattered by the tissue and generating a corresponding detected light signal; separating the detected light signal into a multi-dimensional signal, each of the dimensions of the multi-dimensional signal corresponding to scattered light received at a wavelength of the plurality of wavelengths; performing principal component analysis in response to the multi-dimensional signal to generate corresponding signal data; and generating one of a therapy control signal and a diagnostic output signal in response to the signal data. - View Dependent Claims (20)
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Specification