WO2002084261A3 - Optically similar reference samples and related methods for multivariate calibration models used in optical spectroscopy - Google Patents

Optically similar reference samples and related methods for multivariate calibration models used in optical spectroscopy Download PDF

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Publication number
WO2002084261A3
WO2002084261A3 PCT/US2002/009470 US0209470W WO02084261A3 WO 2002084261 A3 WO2002084261 A3 WO 2002084261A3 US 0209470 W US0209470 W US 0209470W WO 02084261 A3 WO02084261 A3 WO 02084261A3
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WO
WIPO (PCT)
Prior art keywords
similar reference
interest
optically similar
sample
test sample
Prior art date
Application number
PCT/US2002/009470
Other languages
French (fr)
Other versions
WO2002084261A2 (en
Inventor
Craig Gardner
Michael J Haass
Robert K Rowe
Howard Jones
Steven T Strohl
Matthew J Novak
Russell E Abbink
David Nunez
William Gruner
Robert D Johnson
Original Assignee
Rio Grande Medical Tech Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rio Grande Medical Tech Inc filed Critical Rio Grande Medical Tech Inc
Priority to CA002444354A priority Critical patent/CA2444354A1/en
Priority to AU2002305098A priority patent/AU2002305098A1/en
Priority to EP02733899A priority patent/EP1379856A2/en
Publication of WO2002084261A2 publication Critical patent/WO2002084261A2/en
Publication of WO2002084261A3 publication Critical patent/WO2002084261A3/en

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/25Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
    • G01N21/27Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands using photo-electric detection ; circuits for computing concentration
    • G01N21/274Calibration, base line adjustment, drift correction
    • G01N21/278Constitution of standards
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61BDIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00Measuring for diagnostic purposes; Identification of persons
    • A61B5/0059Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence
    • A61B5/0075Measuring for diagnostic purposes; Identification of persons using light, e.g. diagnosis by transillumination, diascopy, fluorescence by spectroscopy, i.e. measuring spectra, e.g. Raman spectroscopy, infrared absorption spectroscopy

Abstract

Systems and methods for establishing and/or maintaining the prediction capability over time of a multivariate calibration model designed for quantitative optical spectroscopic measurement of attributes or analytes in bodily tissues, bodily fluids or other biological samples, which are particularly useful when the spectral absorbance of the attribute or analyte is small relative to the background. The present invention provides an optically similar reference sample to capture the characteristics of instrument and environmental variation and to reduce the effect of such variation of the measurement capability of the model. The optically similar reference is preferably stable over time and is designed such that its optical properties are sufficiently matched to the sample of interest that instrument and environmental variations are captured in the same manner in both the test sample of interest and the optically similar reference sample. The optically similar reference sample max include one or more physical components which are spectroscopically measured in a manner which closely mimics the spectroscopic measurement of the test sample of interest. Spectral similarity may also be achieved by using alternative components with spectral characteristics similar to the components contained in the test sample of interest.
PCT/US2002/009470 2001-04-11 2002-03-27 Optically similar reference samples and related methods for multivariate calibration models used in optical spectroscopy WO2002084261A2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CA002444354A CA2444354A1 (en) 2001-04-11 2002-03-27 Optically similar reference samples and related methods for multivariate calibration models used in optical spectroscopy
AU2002305098A AU2002305098A1 (en) 2001-04-11 2002-03-27 Optically similar reference samples and related methods for multivariate calibration models used in optical spectroscopy
EP02733899A EP1379856A2 (en) 2001-04-11 2002-03-27 Optically similar reference samples and related methods for multivariate calibration models used in optical spectroscopy

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US09/832,608 2001-04-11
US09/832,608 US6983176B2 (en) 2001-04-11 2001-04-11 Optically similar reference samples and related methods for multivariate calibration models used in optical spectroscopy

Publications (2)

Publication Number Publication Date
WO2002084261A2 WO2002084261A2 (en) 2002-10-24
WO2002084261A3 true WO2002084261A3 (en) 2003-08-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2002/009470 WO2002084261A2 (en) 2001-04-11 2002-03-27 Optically similar reference samples and related methods for multivariate calibration models used in optical spectroscopy

Country Status (5)

Country Link
US (1) US6983176B2 (en)
EP (1) EP1379856A2 (en)
AU (1) AU2002305098A1 (en)
CA (1) CA2444354A1 (en)
WO (1) WO2002084261A2 (en)

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