Systems and methods for blood glucose and other analyte detection and measurement using collision computing
In a noninvasive system for detection/measurement of glucose and other analytes in a medium such as tissue, illumination is directed to the medium and corresponding radiation from the medium is collected. Spectral energy changes associated with fragment(s)/feature(s) obtained from the collected radiation are determined using collision computing. Such spectral energy changes generally represent analyte concentration. The illumination is controlled to target a particular volume of the medium and/or such that the spectral energy changes become directionally monotonic with respect to analyte concentration. The illumination parameters include: intensity, wavelength, bandwidth, focal length, and/or duration of illumination, location and/or a size of an illuminated spot on the medium surface, depth at which the illumination can reach below the medium surface, spacing between the illuminated spot and a spot on the medium surface from which radiation is collected, and angle of the illumination relative to the medium surface.
1. A method for facilitating analysis of a medium, the method comprising the steps of: directing illumination to a medium; controlling a parameter of the illumination; collecting a first radiation fragment from the medium; and determining, via a collision computer, a first renormalized spectral energy change associated with at least a portion of the first radiation fragment.
2. The method of claim 1 , wherein the medium comprises a tissue.
3. The method of claim 1 , wherein controlling the parameter comprises selecting a value of the parameter based on, at least in part, a specified target volume within the medium.
4. The method of claim 1 , wherein the first renormalized spectral energy change corresponds to a quantity of an analyte present within the medium.
5. The method of claim 1 , further comprising:
collecting a second radiation fragment from the medium, at least one of: (i) a time of collection of the second fragment being different from a time of collection of the first fragment, and (ii) a spatial characteristic of the second fragment being different from a corresponding spatial characteristic of the first fragment; and
determining, via collision computing, a second renormalized spectral energy change associated with at least a portion of the second radiation fragment,
wherein one of:
(a1) the first renormalized spectral energy change comprises a first renormalized spectral energy gain and the second renormalized spectral energy change comprises a second renormalized spectral energy gain; and
(b1) controlling the parameter comprises adjusting the parameter to a value at which the second renormalized spectral energy gain is not less than the first renormalized spectral energy gain; and
(a2) the first renormalized spectral energy change comprises a first renormalized spectral energy loss and the second renormalized spectral energy change comprises a second renormalized spectral energy loss; and
(b2) controlling the parameter comprises adjusting the parameter to a value at which the second renormalized spectral energy loss is not less than the first renormalized spectral energy loss.
6. The method of claim 5 , wherein the parameter comprises at least one of: (i) an amplitude of the illumination, comprising at least one of an intensity of the illumination and a duration of the illumination, (ii) a focal length of the illumination, (iii) a focal point of the illumination, (iv) a location of a target region to be illuminated by the illumination, (v) a size of the target region to be illuminated by the illumination, (vi) an angle of incidence of the illumination upon the medium, and (vii) a spectral characteristic, comprising at least one of a wavelength and a bandwidth, of the illumination.
7. The method of claim 1 , wherein controlling the parameter comprises adjusting a focal length of the illumination.
8. The method of claim 7 , wherein adjusting the focal length comprises at least one of: (i) electronic tuning of a photorefractive material, (ii) acoustic tuning of a photorefractive material, (iii) electrical modulation of a dynamic lens, and (iv) radio frequency (RF) modulation of a dynamic lens.
9. The method of claim 1 , wherein controlling the parameter comprises adjusting an amplitude of the illumination by adjusting at least one of: (i) an area of exposed emitter surface, (ii) a shutter aperture size, (iii) a voltage of the illumination source, and (iv) a number of illumination sources that are tuned ON.
10. The method of claim 1 , wherein controlling the parameter comprises adjusting a spatial parameter associated with a target of the illumination.
11. The method of claim 10 , wherein adjusting the spatial parameter comprises varying a spacing between the illumination target and an area of detection used for collecting the first radiation fragment, varying the spacing comprising at least one of opto-mechanically varying the spacing and electro-optically varying the spacing.
12. The method of claim 10 , wherein adjusting the spatial parameter comprises varying an illuminated area of the illumination target, varying the illuminated area comprising at least one of opto-mechanically varying the illuminated area and electro-optically varying the illuminated area by adjusting at least one of a standoff and a focal length of an illumination source.
13. The method of claim 10 , wherein adjusting the spatial parameter comprises at least one of opto-mechanically varying a location of the illumination target and electro-optically varying the location of the illumination target.
14. The method of claim 1 , wherein controlling the parameter comprises adjusting a duration of the illumination by at least one of: (i) turning at least one illumination source ON and OFF, and (ii) adjusting a duration for which a shutter remains open.
15. The method of claim 1 , wherein controlling the parameter comprises adjusting an angle at which the illumination is incident upon a surface of the medium.
16. The method of claim 1 , wherein controlling the parameter comprises adjusting at least one of: (i) a wavelength of the illumination and (ii) a bandwidth of the illumination.
17. A system for facilitating analysis of a medium, comprising:
an adjustable illumination subsystem for directing illumination to a medium;
a collector for collecting a radiation fragment from the medium; and
a collision computer programmed to compute a first renormalized spectral energy change associated with at least a portion of the radiation fragment.
18. The system of claim 17 , wherein the adjustable illumination subsystem is adapted to adjust at least one of: (i) an amplitude of the illumination, comprising at least one of an intensity of the illumination and a duration of the illumination, (ii) a focal length of the illumination, (iii) a focal point of the illumination, (iv) a location of a target region to be illuminated by the illumination, (v) a size of the target region to be illuminated by the illumination, (vi) an angle of incidence of the illumination upon the medium, and (vii) a spectral characteristic, comprising at least one of a wavelength and a bandwidth, of the illumination.
19. The system of claim 17 , wherein the adjustable illumination subsystem comprises a device having an adjustable focus, for adjusting a focal length of the illumination.
20. The method of claim 19 , wherein the device comprises at least one of: (i) electronically tunable photorefractive element, (ii) acoustically tunable photorefractive element, (iii) an electrically modulated dynamic lens, and (iv) a radio frequency (RF) modulated dynamic lens.
21. The system of claim 20 , wherein the photorefractive element comprises a phase-conjugate mirror.
22. The system of claim 17 , wherein the adjustable illumination subsystem comprises at least one of: (i) an emitter having an adjustable exposed surface area, (ii) a shutter having an adjustable aperture, at least one of a size of the aperture and a duration for which the aperture is open being adjustable, (iii) an illumination source having adjustable voltage, and (iv) a plurality of illumination sources, at least one of which is selectively switchable ON and OFF, for adjusting an amplitude of the illumination.
23. The system of claim 22 , wherein a duration for which at least one of the illumination sources is selectively switched ON is adjustable.
24. The system of claim 17 , wherein the adjustable illumination subsystem comprises a translator adapted to spatially adjust at least one of: (i) a focal point of the illumination relative to a surface of the medium and (ii) a location of a target area of the illumination.
25. The system of claim 24 , wherein the translator is adapted to adjust at least one of: (i) a focal length of the illumination, and (ii) a standoff between a component of the illumination subsystem and the surface of the medium.
26. The system of claim 24 , wherein the translator comprises at least one of an opto-mechanical translator and an electro-optical translator.
27. The system of claim 24 , wherein the translator comprises at least one of a scanning mirror and a voice coil.
28. The system of claim 17 , wherein the adjustable illumination subsystem comprises an optical component for directing the illumination to the medium at a specified angle of incidence upon a surface of the medium.
29. The system of claim 28 , wherein the optical component comprises a plurality of optical fibers each being oriented at a different angle relative to a normal axis.
30. The system of claim 17 , wherein the adjustable illumination subsystem comprises an illumination source having at least one of: (i) an adjustable wavelength, and (ii) an adjustable bandwidth.