Title:
COMPONENT-CONCENTRATION MEASURING APPARATUS AND METHOD
Document Type and Number:
WIPO Patent Application WO/2019/181375
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a component-concentration measuring apparatus and method that are capable of enhancing the quantitative precision in measuring a component concentration in a living organism. A component-concentration measuring apparatus 1 is characterized: in that the component-concentration measuring apparatus 1 is provided with a light radiating unit that irradiates an object 10 to be measured, with two light beams, which have different wavelengths from each other, at the same frequency after modulating the intensities thereof by means of signals of the same phase, a detecting unit that detects photoacoustic waves that are generated inside the object 10 to be measured due to the irradiation by the light radiating unit and that converts the detected photoacoustic waves to first electrical signals, and a processing unit that determines the concentration of a target component 10G contained in the object 10 to be measured on the basis of the amplitude and phase of the first electrical signals; and in that the absorption coefficient of the two light beams with respect to a background component 10W contained in the object 10 to be measured exhibit the same amount of change δ with respect to a change in temperature and have signs that are different from each other.
Inventors:
TANAKA YUJIRO (JP)
TAJIMA TAKURO (JP)
TAJIMA TAKURO (JP)
Application Number:
PCT/JP2019/006966
Publication Date:
September 26, 2019
Filing Date:
February 25, 2019
Export Citation:
Assignee:
NIPPON TELEGRAPH & TELEPHONE (JP)
International Classes:
A61B5/145; G01N21/00; G01N29/00
Foreign References:
| JP2018013417A | 2018-01-25 | |||
| JP2009213563A | 2009-09-24 | |||
| JP2007051879A | 2007-03-01 | |||
| JP2009136324A | 2009-06-25 | |||
| JP2017217203A | 2017-12-14 | |||
| JP2017217202A | 2017-12-14 |
Attorney, Agent or Firm:
YAMAKAWA, Shigeki et al. (JP)
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