Method and apparatus for measuring a concentration of a component in a subject
First Claim
1. A method of measuring a concentration of a component in a subject, comprising:
- setting an intensity relationship equation between a positive-order beam and a negative-order beam with respect to a reference matter at a particular wavelength by measuring both the positive-order and negative-order beams output from the reference matter;
applying a light having a first wavelength band absorbed by the component and detecting an intensity of a positive-order beam output from the subject and an intensity of a negative-order beam output from the reference matter, the positive-order beam and the negative-order beam having a second wavelength band;
calculating an intensity of a positive-order beam input to the subject by applying the intensity of the negative-order beam output from the reference matter to the intensity relationship equation; and
calculating absorbance using the intensity of the positive-order beam output from the subject and the intensity of the positive-order beam input to the subject and measuring a concentration of the component using the absorbance.
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Accused Products
Abstract
A method of measuring a concentration of a component in a subject includes setting an intensity relationship equation between a positive-order beam and a negative-order beam with respect to a reference matter at a particular wavelength, applying a light having a first wavelength band absorbed by the component and detecting an intensity of a positive-order beam output from the subject and an intensity of a negative-order beam output from the reference matter, the positive-order beam and the negative-order beam having a second wavelength band, calculating an intensity of a positive-order beam input to the subject by applying the intensity of the negative-order beam output from the reference matter to the intensity relationship equation, and calculating absorbance using the intensity of the positive-order beam output from the subject and the intensity of the positive-order beam input to the subject and measuring a concentration of the component using the absorbance.
36 Citations
19 Claims
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1. A method of measuring a concentration of a component in a subject, comprising:
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setting an intensity relationship equation between a positive-order beam and a negative-order beam with respect to a reference matter at a particular wavelength by measuring both the positive-order and negative-order beams output from the reference matter; applying a light having a first wavelength band absorbed by the component and detecting an intensity of a positive-order beam output from the subject and an intensity of a negative-order beam output from the reference matter, the positive-order beam and the negative-order beam having a second wavelength band; calculating an intensity of a positive-order beam input to the subject by applying the intensity of the negative-order beam output from the reference matter to the intensity relationship equation; and calculating absorbance using the intensity of the positive-order beam output from the subject and the intensity of the positive-order beam input to the subject and measuring a concentration of the component using the absorbance. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for measuring a concentration of a component in a subject, comprising:
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a light source that generates a light having a first wavelength band for the component; a tunable filter that receives the light having the first wavelength band and generates a positive-order beam and a negative-order beam, which have a second wavelength band, according to a tuning signal applied thereto; a first light detector that detects a first output beam reflected from or transmitted through the subject onto which the positive-order beam generated by the tunable filter has been radiated; a second light detector that detects a second output beam reflected from or transmitted through a reference matter onto which the negative-order beam generated by the tunable filter has been radiated; and a signal processor, which has been previously provided with an intensity relationship equation between the positive-order beam and the negative-order beam obtained by measuring both the positive-order and negative-order beams output from the reference matter, that calculates an intensity of the positive-order beam input to the subject by applying an intensity of the second output beam from the reference matter to the intensity relationship equation, calculates absorbance using the intensity of the first output beam from the subject and the intensity of the positive-order beam input to the subject, and measures a concentration of the component using the absorbance. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification