[특허]Quantification of an absorber through a scattering medium

The Royal Institute for the Advancement of Learning/McGill University

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특허 상세정보

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Quantification of an absorber through a scattering medium

특허상세정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01J-005/02
미국특허분류(USC)	250/341.8;
출원번호	US-0739951 (2008-11-10)
등록번호	US-8384033 (2013-02-26)
국제출원번호	PCT/CA2008/001988 (2008-11-10)
§371/§102 date	20100426 (20100426)
국제공개번호	WO2009/059433 (2009-05-14)
발명자 / 주소	Burns, David H. Pandozzi, Fabiano
출원인 / 주소	The Royal Institute for the Advancement of Learning/McGill University
인용정보	피인용 횟수 : 1 인용 특허 : 3

초록
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There is described a method for determining a quantitative parameter of a compound in an analysis sample, comprising: providing a scattering medium in physical contact with the analysis sample, the scattering medium having at least one layer, an index of refraction of the scattering medium being superior to an index of refraction of the analysis sample; propagating, in the scattering medium, an incident beam of light having a wavelength substantially corresponding to an absorption wavelength of the compound such that an evanescent wave is generated at an interface between the scattering medium and the analysis sample; taking n intensity measurements of a reflected beam of light for the analysis sample, n being superior to one; and determining the quantitative parameter of the compound using the n intensity measurements for the analysis sample.

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1. A method for determining a quantitative parameter of a biological marker in a fluid of a subject in vivo, the fluid being in physical contact with a biological scattering medium having at least one layer, an index of refraction of said scattering medium being superior to an index of refraction of said fluid; propagating, in said scattering medium, an incident beam of light having a wavelength substantially corresponding to an absorption wavelength of said biological marker such that an evanescent wave is generated at an interface between said scattering medium and said fluid;taking n intensity measurements of a reflected beam of light for said fluid, n being superior to one; anddetermining said quantitative parameter of said biological marker using said n intensity measurements for said fluid. 2. A method as claimed in claim 1, wherein said taking n intensity measurements comprises measuring an intensity of said reflected beam of light for said fluid at n different distances from an emitter of said incident beam of light. 3. A method as claimed in claim 1, wherein said taking n intensity measurements comprises measuring an intensity of said reflected beam of light for said fluid at n different instants in time. 4. A method as claimed in claim 1, wherein said determining said quantitative parameter comprises determining said quantitative parameter using a stagewise multi-linear regression. 5. A method as claimed in claim 4, wherein said determining said quantitative parameter comprises determining a concentration of said biological marker in said fluid using n weighting parameters. 6. A method as claimed in claim 1, wherein said determining said quantitative parameter comprises determining said quantitative parameter using a multivariate curve resolution method and non-negativity constraints. 7. A method for diagnosis or prognosis of a medical condition or for monitoring efficacy of a therapeutic treatment or for monitoring disease progression in a subject comprising using the method of claim 1 to measure a biological marker in the subject, wherein the concentration of the biological marker or a change in the concentration of the biological marker in the subject is prognostic or diagnostic of a medical condition or indicates efficacy of the therapeutic treatment or progression of the disease. 8. The method of claim 1, wherein bladder volume, urine volume or a change in bladder or urine volume are measured in the subject. 9. The method according to claim 1, wherein said biomarker is protein, lactate, pyruvate or glucose; said protein is haemoglobin or a cytochrome c enzyme; said fluid is cerebrospinal fluid or amniotic fluid; and said subject is a human. 10. The method according to claim 1, wherein the fluid is cerebrospinal fluid and the biological scattering medium comprises a skull of the subject. 11. A method for determining a thickness of a scattering medium, comprising: for each one of at least two samples comprising a compound and having an index of refraction inferior to an index of refraction of said scattering medium,positioning a sample in physical contact with said scattering medium;propagating in said scattering medium an incident beam of light having a wavelength corresponding to an absorption wavelength of said compound such that an evanescent wave is generated at an interface between said scattering medium and said sample; andtaking n intensity measurements of a reflected beam of light for said sample, n being superior to one; anddetermining said thickness using a multivariate curve resolution method, non-negativity constraints, and said n intensity measurements for said at least two samples. 12. A system for determining a quantitative parameter of a biological marker in an fluid of a subject in vivo, comprising: a processor in a machine, said processor being adapted to receive n intensity measurements of a reflected beam of light for said fluid, n being superior to one, said reflected beam of light resulting from a propagation of an incident beam of light in a biological scattering medium being in physical contact with said fluid such that an evanescent wave is generated at an interface between said scattering medium and said fluid, an index of refraction of said scattering medium being superior to an index of refraction of said fluid, said scattering medium having at least one scattering layer; andan application coupled to said processor, said application being configured for determining said quantitative parameter of said biological marker using said n intensity measurements of said reflected beam of light for said fluid. 13. A system as claimed in claim 12, wherein said processor is adapted to receive said n intensity measurements of said reflected beam of light for said fluid taken at n different distances from an emitter of said incident beam of light. 14. A system as claimed in claim 12, wherein said processor is adapted to receive said n intensity measurements of said reflected beam of light for said fluid taken at n different instants in time. 15. A system as claimed in claim 12, wherein said application is further configured for said determining said quantitative parameter using a stagewise multi-linear regression. 16. A system as claimed in claim 15, wherein said application is further configured for determining said quantitative parameter to be a concentration of said biological marker in said fluid using n weighting parameters. 17. A system as claimed in claim 12, wherein said application is further configured for determining said quantitative parameter using a multivariate curve resolution method and non-negativity constraints. 18. A system for determining a thickness of a scattering medium, comprising: a processor in a machine, said processor being adapted to receive n intensity measurements of a reflected beam of light for at least two samples each comprising a compound, n being superior to one; andan application coupled to said processor, said application being configured for determining said thickness using a multivariate curve resolution method, non-negativity constraints, and said n intensity measurements for said at least two samples,for each one of said at least two samples, said reflected beam of light resulting from a propagation of an incident beam of light in said scattering medium being in physical contact with said sample such that an evanescent wave be generated at an interface between said scattering medium and said sample, an index of refraction of said scattering medium being superior to an index of refraction of said sample. 19. A system for determining a property related to one of a fluid of a subject in vivo and a biological scattering medium, the fluid comprising a biological marker and being in physical contact with the scattering medium, the scattering medium having at least one layer, an index of refraction of said scattering medium being superior to an index of refraction of said fluid, said system comprising: a light source adapted to emit an incident beam of light having a wavelength corresponding to an absorption wavelength of said biological marker;at least one photodetector adapted to take n intensity measurements of a reflected beam light for said fluid, said reflected beam of light resulting from a propagation of said incident in said scattering medium such that an evanescent wave be generated at an interface between said scattering medium and said fluid; anda property determining module connected to said at least one photodetector and adapted to determine said property in accordance with said n intensity measurements of said reflected beam of light for said fluid.

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Quantification of an absorber through a scattering medium

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Quantification of an absorber through a scattering medium

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