Patent ID: 11957436
Assignee: NIPPON TELEGRAPH AND TELEPHONE CORPORATION
Field: Measurement (Instruments)
Classification: CPC A  G | IPC A  G

Claim 0:
1. An in-vivo temperature measurement device comprising:
an ultrasonic wave irradiator that irradiates a living body with a first ultrasonic wave and a second ultrasonic wave;
an ultrasonic wave detector that receives a third ultrasonic wave reflected by the living body in response to the first ultrasonic wave and a fourth ultrasonic wave reflected by the living body in response to the second ultrasonic wave;
a frequency calculator that calculates a frequency of a fifth ultrasonic wave amplified in the living body based on information regarding a structure of the living body;
a frequency analyzer that:
performs frequency analysis on the third ultrasonic wave and the fourth ultrasonic wave; and
acquires a first amplitude spectrum of the third ultrasonic wave and a second amplitude spectrum of the fourth ultrasonic wave;

a frequency identifier that identifies, from the first amplitude spectrum and the second amplitude spectrum, a first peak frequency of the first amplitude spectrum that is closest to the frequency calculated by the frequency calculator and second peak frequency of the second amplitude spectrum that is closest to the frequency calculated by the frequency calculator;
a frequency change calculator that calculates an amount of frequency change, from the first peak frequency and the second peak frequency; and
a temperature change calculator that calculates an amount of temperature change in the living body from the amount of frequency change.