Optical system for measuring metabolism in a body and imaging method
First Claim
1. An optical system for measuring change in cerebral hemodynamic movement comprising:
- a plurality of light irradiators for irradiating light rays on a head portion of a subject;
a plurality of light receivers for receiving light rays reflected within said subject;
a computing unit for calculating spatial distribution of signals of an object to be measured on the basis of signals detected by said light receivers; and
a display unit for displaying said spatial distribution;
wherein plural said light receivers adjacent to a common said light irradiator, are all disposed on positions distant by a substantially same distance from said common said light irradiator, where said distance is not less than 10 mm and not larger than 50 mm.
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Abstract
In an optical measurement system and imaging method adapted to measure in vivo information in a living body without harming the living body, light rays of a plurality of wavelengths which are modulated in intensity with a plurality of different frequencies are irradiated on a plurality of irradiation positions on the surface of a living body, and time-variable changes in living body transmitting light intensity levels corresponding to the respective wavelengths and the respective irradiation positions are measured at different positions on the surface of the living body. Light is utilized to image the results of the measurements, in which the measuring time is shortened by estimating fluctuation attributable to the living body, and the presence or absence of a change in measured signal can be decided easily by displaying an estimation signal and a measured signal at a time.
38 Citations
20 Claims
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1. An optical system for measuring change in cerebral hemodynamic movement comprising:
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a plurality of light irradiators for irradiating light rays on a head portion of a subject; a plurality of light receivers for receiving light rays reflected within said subject; a computing unit for calculating spatial distribution of signals of an object to be measured on the basis of signals detected by said light receivers; and a display unit for displaying said spatial distribution; wherein plural said light receivers adjacent to a common said light irradiator, are all disposed on positions distant by a substantially same distance from said common said light irradiator, where said distance is not less than 10 mm and not larger than 50 mm. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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2. An optical system for measuring change in cerebral hemodynamic movement comprising:
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a plurality of light irradiators for irradiating light rays on a head portion of a subject; a plurality of light receivers for receiving light rays reflected within said subject; a computing unit for calculating spatial distribution of signals of an object to be measured on the basis of signals detected by said light receivers; and a display unit for displaying said spatial distribution; wherein plural said light receivers adjacent to a common said light irradiator, are all disposed on positions distant by a substantially same distance from said common said light irradiator, where said distance is not less than 10 mm and not larger than 50 mm; wherein one of said light receivers detect light rays irradiated by some of said light irradiators adjacent to said one of said light receivers; and wherein light rays irradiated by said one of said light irradiators are detected by said some of said light receivers adjacent to said one of said light irradiators.
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3. An optical system for measuring change in cerebral hemodynamic movement comprising:
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a plurality of light irradiators for irradiating light rays on a head portion of a subject; a plurality of light receivers for receiving light rays reflected within said subject; a computing unit for calculating spatial distribution of signals of an object to be measured on the basis of signals detected by said light receivers; and a display unit for displaying said spatial distribution; wherein said plurality of light irradiators and said plurality of light receivers are alternately arranged on said head portion of said subject in lattice; and wherein plural said light receivers adjacent to a common said light irradiator, are all disposed on positions distant by a substantially same distance from said common said light irradiator, where said distance is not less than 10 mm and not larger than 50 mm.
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Specification