Abstract: An internal body temperature measurement device includes: a temperature sensor which measures an epidermis temperature of a living body; a heat flux sensor which measures a magnitude of a heat flux discharged from a body surface of the living body; a blood flow sensor which measures a blood flow rate in a vicinity of the heat flux sensor; and a storage unit which stores a relation between the blood flow rate in the vicinity of the heat flux sensor and a core temperature depth. A correction amount of the core temperature depth corresponding to the blood flow rate in the vicinity of the heat flux sensor is obtained on a basis of the relation stored in the storage unit, and a core temperature of the living body is calculated from the epidermis temperature, the magnitude of the heat flux, and the correction amount of the core temperature depth.

Abstract: A component concentration measurement device includes a light application unit that applies pulsed beam light of a wavelength that is absorbed by a target substance for measurement to a site of measurement, and a detection unit that detects a photoacoustic signal generated in the site of measurement where the beam light emitted from the light application unit has been applied. The light application unit applies the pulsed beam light with a pulse width at which a photoacoustic wave that occurs at a rising edge of a light pulse and a photoacoustic wave that occurs at a falling edge of the light pulse do not interfere with each other.

Abstract: A device includes: an ultrasonic wave irradiation unit that irradiates a living body with an ultrasonic wave; an ultrasonic wave detection unit that receives an ultrasonic wave reflected by the living body; and a calculation unit that calculates an amount of temperature change in the living body. The calculation unit is configured to: calculate a frequency of an ultrasonic wave amplified in the living body, based on information on a structure of the living body; perform frequency analysis on the ultrasonic wave received by the ultrasonic wave detection unit and acquire an amplitude spectrum of the ultrasonic wave; identify, from the amplitude spectrum, a peak frequency closest to the frequency of the ultrasonic wave; calculate an amount of frequency change, from two peak frequencies identified by ultrasonic wave irradiations in twice; and calculate an amount of temperature change in the living body from the amount of frequency change.

Abstract: A heat flux sensor including two temperature sensors is used to obtain time-series data of a core temperature of a living body, and a blood flow rate in a vicinity of the heat flux sensor is measured by a blood flow sensor. In an arithmetic circuit, a delay time until a fluctuation of the core temperature of the living body is reflected on an epidermis temperature is calculated on the basis of the blood flow rate measured by the blood flow sensor and a previously prepared relation between the blood flow rate and the delay time until the fluctuation of the core temperature of the living body is reflected on the epidermis temperature, and a time corresponding to the core temperature of the living body on the basis of the delay time is corrected.

Abstract: A light irradiation unit configured to irradiate a measurement part with a light beam that has a wavelength absorbed by glucose and a detection unit configured to detect a photoacoustic signal generated from the measurement part irradiated with the light beam emitted from the light irradiation unit are included. The light irradiation unit irradiates the measurement part by scanning the light beam 2-dimensionally. The measurement part is irradiated with the light beam through raster scanning. For example, the light beam has a beam diameter of about 100 ?m and is scanned at a scanning speed of about 100 ?m/10 ms.