Method and system for decomposition of multiple channel signals
First Claim
1. A method for decomposition of a multiple channel signal reflecting characteristics of a blood perfused fleshy medium for use in determination of at least one desired blood parameter, the method comprising:
- (i) illuminating a portion of the medium by amplitude-modulated light of more than two different optic channels having wavelength in a range where the scattering properties of blood are sensitive to light radiation;
(ii) sensing a light response of the medium and generating said multiple channel signal; and
(iii) analyzing said multiple channel signal, where the analyzing includes;
(i) filtering said multiple channel signal and separating at least a part of multiple channels from each other; and
(ii) providing time evolutions of the light responses of the medium for the part of said multiple channels, the method, wherein said amplitude-modulated light is activated in a composite mode regime employing a combination of parallel and serial modes; and
the filtering of said multiple channel signal and the separating of said multiple channels from each other both includes applying an adaptive resonator bank to said multiple channel signal.
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Abstract
A method and a system for decomposition of a multiple channel signal reflecting characteristics of a blood perfused fleshy medium is provided. This technique can be utilized for determination of at least one desired blood parameter. According to the method a portion of the medium is illuminated by amplitude-modulated light of more than two different optic channels having wavelength in a range where the scattering properties of blood are sensitive to light radiation. Further, a light response of the medium sensed, and the multiple channel signal is generated. Thereafter, the multiple channel signal is analyzed that includes: filtering the multiple channel signal and separating at least a part of multiple channels from each other, and providing time evolutions of the light responses of the medium for the part of said multiple channels. According to the invention, the amplitude-modulated light is activated in a composite mode regime employing a combination of parallel and serial modes. The filtering of said multiple channel signal and the separating of said multiple channels from each other both includes applying an adaptive resonator bank to the multiple channel signal.
79 Citations
31 Claims
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1. A method for decomposition of a multiple channel signal reflecting characteristics of a blood perfused fleshy medium for use in determination of at least one desired blood parameter, the method comprising:
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(i) illuminating a portion of the medium by amplitude-modulated light of more than two different optic channels having wavelength in a range where the scattering properties of blood are sensitive to light radiation;
(ii) sensing a light response of the medium and generating said multiple channel signal; and
(iii) analyzing said multiple channel signal, where the analyzing includes;
(i) filtering said multiple channel signal and separating at least a part of multiple channels from each other; and
(ii) providing time evolutions of the light responses of the medium for the part of said multiple channels, the method, wherein said amplitude-modulated light is activated in a composite mode regime employing a combination of parallel and serial modes; and
the filtering of said multiple channel signal and the separating of said multiple channels from each other both includes applying an adaptive resonator bank to said multiple channel signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A system for determination of at least one blood parameter of a blood perfused fleshy medium, the system comprising:
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(i) a generator for providing a train of activating pulses;
(ii) a multiplexer (MUX) coupled to the generator configured for switching the activating pulses between different optic channels, wherein said switching is carried out in a composite mode regime for said activating pulses;
(iii) a probe including;
(a) an illumination assembly having a plurality of light sources coupled to the MUX and activated by said activating pulses for generating amplitude-modulated light of more than two different optic channels having wavelength in a range where the scattering properties of blood are sensitive to light radiation, and (b) a photodetector adapted for sensing a light response of the medium and generating a multiple channel signal reflecting blood characteristics;
(iv) an analyzer configured for analyzing said multiple channel signal, wherein the analyzer includes a digital signal processor having;
(a) an adaptive resonator bank unit configured for filtering said multiple channel signal and separating at least a part of multiple channels from each other; and
(b) an output filtering unit configured for obtaining time evolutions of the light responses of the medium for the part of said multiple channels, - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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30. A program storage device readable by machine, tangibly embodying a program of instructions executable by the machine to perform method steps for decomposition of a multiple channel signal reflecting characteristics of a blood perfused fleshy medium for use in determination of at least one desired blood parameter, where said multiple channel signal being generated in response to illuminating a portion of the medium by amplitude-modulated light of more than two different optic channels having wavelength in a range where the scattering properties of blood are sensitive to light radiation, the method steps comprising:
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analyzing said multiple channel signal, where the analyzing includes;
(i) filtering said multiple channel signal and separating at least a part of multiple channels from each other; and
(ii) providing time evolutions of the light responses of the medium for the part of said multiple channels, the method steps, wherein said amplitude-modulated light is activated in a composite mode regime representing a combination of parallel and serial modes; and
the filtering of said multiple channel signal and the separating of said multiple channels from each other both includes applying an adaptive resonator bank to said multiple channel signal.
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31. A computer program product comprising a computer useable medium having computer readable program code embodied therein for decomposition of a multiple channel signal reflecting characteristics of a blood perfused fleshy medium for use in determination of at least one desired blood parameter, where said multiple channel signal being generated in response to illuminating a portion of the medium by amplitude-modulated light of more than two different optic channels having wavelength in a range where the scattering properties of blood are sensitive to light radiation, the computer program product comprising:
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computer readable program code for causing the computer to analyzing said multiple channel signal, where the analyzing includes;
filtering said multiple channel signal and separating at least a part of multiple channels from each other; and
providing time evolutions of the light responses of the medium for the part of said multiple channels, wherein said amplitude-modulated light is activated in a composite mode regime representing a combination of parallel and serial modes; and
the filtering of said multiple channel signal and the separating of said multiple channels from each other both includes applying an adaptive resonator bank to said multiple channel signal.
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Specification