Non-invasive detection of analytes in a complex matrix
First Claim
1. A system for detecting an analyte in a specimen characterized by a given cardiac period;
- the system comprising;
a radiation source configured to generate analytical radiation such that a wavelength of said analytical radiation scans an analytical spectral range over a diagnostic time period, whereinsaid analyte is characterized by an absorption spectrum within said analytical spectral range anda duration of said diagnostic time period is a fraction of said cardiac period;
a detector configured to receive said analytical radiation and generate a signal indicative of attenuation of said analytical radiation over at least a portion of said spectral range, wherein said radiation source and said detector are configured such that an intensity of said analytical radiation received by said detector is subject to attenuation by said analyte within at least a portion of said analytical spectral range; and
a processor configured to receive said attenuation signal until a desired signal-to-noise ratio associated with said attenuation signal is established by said processor.
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Abstract
A system and method for determining the concentration of analytes of interest in complex matrices is provided. According to one aspect of the present invention, near-infrared analytical radiation is generally directed onto a portion of a specimen containing the analyte of interest. A wavelength of the analytical radiation is scanned over the specimen over a broad range of frequencies and over a short duration of diagnostic time. A spectrum of radiation is transmitted through, reflected from or scattered from the specimen and collected by a detector. The concentration of the analyte of interest in the specimen is determined by the radiation collected by the detector.
34 Citations
46 Claims
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1. A system for detecting an analyte in a specimen characterized by a given cardiac period;
- the system comprising;
a radiation source configured to generate analytical radiation such that a wavelength of said analytical radiation scans an analytical spectral range over a diagnostic time period, wherein said analyte is characterized by an absorption spectrum within said analytical spectral range and a duration of said diagnostic time period is a fraction of said cardiac period; a detector configured to receive said analytical radiation and generate a signal indicative of attenuation of said analytical radiation over at least a portion of said spectral range, wherein said radiation source and said detector are configured such that an intensity of said analytical radiation received by said detector is subject to attenuation by said analyte within at least a portion of said analytical spectral range; and a processor configured to receive said attenuation signal until a desired signal-to-noise ratio associated with said attenuation signal is established by said processor. - View Dependent Claims (2, 3, 4)
- the system comprising;
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5. A system for detecting an analyte in a specimen;
- the system comprising;
a radiation source configured to generate a single beam of analytical radiation and to scan a wavelength of said single beam of analytical radiation over an analytical spectral range, wherein said analyte is characterized by an absorption spectrum within said analytical spectral range; and a detector configured to receive said single beam of analytical radiation and from said received single beam of analytical radiation generate a signal indicative of attenuation of said single beam of analytical radiation over at least a portion of said spectral range, wherein said source and said detector are configured such that an intensity of said analytical radiation received by said detector is subject to attenuation by said analyte within at least a portion of said analytical spectral range; and a processor configured to receive said attenuation signal until a desired signal-to-noise ratio associated with said attenuation signal is established by said processor. - View Dependent Claims (6)
- the system comprising;
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7. A system for detecting an analyte-of-interest in a specimen;
- the system comprising a radiation source, a detector, and a processor, wherein;
said radiation source is configured to generate analytical radiation characterized by a spectral line width less than about 20 nm over an analytical spectral range from about 900 nm to about 2700 nm, control the spectral width of said analytical spectral range so as to enable discrimination between said analyte-of-interest and other analytes in said specimen, scan a wavelength of said analytical radiation over said controlled spectral width; said detector is configured to receive said analytical radiation and generate a signal indicative of attenuation of said analytical radiation over at least a portion of said spectral range; said source and said detector are configured such that an intensity of said analytical radiation received by said detector is subject to attenuation by said analyte within at least a portion of said analytical spectral range; and said processor is configured to receive said attenuation signal until a desired signal-to-noise ratio associated with said attenuation signal is established by said processor. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
- the system comprising a radiation source, a detector, and a processor, wherein;
Specification