Method and apparatus for noninvasive targeting
First Claim
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1. An apparatus for noninvasive determination of a property of a skin tissue, comprising:
- means for generating a feedback signal representative of at least one internal layer of said tissue, wherein said feedback signal represents an extracted feature;
means for adjusting a measurement system to enhance targeting of said tissue layer through use of said feedback signal;
means for collecting a near-infrared measurement signal using said measurement system, wherein said measurement signal is representative of said at least said tissue layer; and
a chemometric module for for deriving said property of said tissue from said measurement signal.
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Abstract
The invention relates to noninvasive sampling. In one embodiment, the invention relates to a sample probe interface method and apparatus for targeting a tissue depth and/or pathlength that is used in conjunction with a noninvasive analyzer to control spectral variation. In a second embodiment, a signal from a sample or target probe of a tissue feature or volume is used in positioning a portion of a measuring system relative to the sample. The system is optionally used in conjunction with a targeting system used to control the sampling location of the measuring system.
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Citations
18 Claims
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1. An apparatus for noninvasive determination of a property of a skin tissue, comprising:
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means for generating a feedback signal representative of at least one internal layer of said tissue, wherein said feedback signal represents an extracted feature;
means for adjusting a measurement system to enhance targeting of said tissue layer through use of said feedback signal;
means for collecting a near-infrared measurement signal using said measurement system, wherein said measurement signal is representative of said at least said tissue layer; and
a chemometric module for for deriving said property of said tissue from said measurement signal. - View Dependent Claims (2, 3)
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4. A method for noninvasively determining an analyte property of a tissue sample, comprising the steps of:
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collecting a feedback targeting signal with a targeting system, wherein said targeting signal represents at least one extracted feature;
adjusting an optical measuring system position using said feedback targeting signal;
noninvasively collecting at least one near-infrared spectrum of said tissue sample using said adjusted optical measuring system; and
chemometrically determining said analyte property from said at least one spectrum. - View Dependent Claims (5, 6, 7, 8, 9, 10)
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11. A method for noninvasive analyte property determination of a blood borne constituent within a tissue, comprising the steps of:
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generating a signal representative of a subsurface feature of said tissue;
dynamically adjusting optics of a noninvasive analyzer, with said signal representative of said subsurface feature;
noninvasively collecting a spectrum of said tissue with said adjusted noninvasive analyzer; and
chemometrically determining said analyte property of said blood borne constituent from said spectrum. - View Dependent Claims (12)
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13. A method for noninvasively determining a glucose concentration of a blood/tissue sample, comprising the steps of:
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generating a feedback targeting signal with a targeting system;
adjusting an optical measuring system position using said feedback targeting signal;
noninvasively collecting at least one near-infrared spectrum of said tissue sample using said adjusted optical measuring system; and
chemometrically determining said glucose concentration from said at least one spectrum. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification