PROBLEM TO BE SOLVED: To provide a temperature measurement method that can measure temperature change in a subject by using a material with characteristics where resonant frequency is hard to change with a temperature change and the resonant frequency changes by magnetic variation are newly discovered.SOLUTION: A temperature measurement method includes: a step of converting a magnetic resonance signal fH(t) detected from a subject into a frequency spectrum FH(ω) by application of a high frequency magnetic field including the resonant frequency of water, and converting a magnetic resonance signal fP(t) detected from the subject into a frequency spectrum FP(ω) by application of a high frequency magnetic field including the resonant frequency of a phosphorus compound a step of acquiring a frequency f1H corresponding to the resonant frequency of water from the frequency spectrum FH(ω), and acquiring a frequency f1P corresponding to the resonant frequency of the phosphorus compound from the frequency spectrum FP(ω) and a step of detecting a temperature change according to a difference between a variation amount ΔfH of the frequency f1H and a variation amount ΔfP of the frequency f1P by using correlation between a variation amount of the resonant frequency of water and a temperature.SELECTED DRAWING: Figure 8COPYRIGHT: (C)2016,JPO&INPIT【課題】温度変化で共鳴周波数が変化しにくく、磁場変化で共鳴周波数が変化する特性が新たに発見された物質を用いて被検体内部の温度変化を計測できる温度計測方法を提供する。【解決手段】温度計測方法は、水の共鳴周波数を含む高周波磁場の印加で被検体から検出される磁気共鳴信号fH(t)を周波数スペクトルFH(ω)に変換し、リン化合物の共鳴周波数を含む高周波磁場の印加で被検体から検出される磁気共鳴信号fP(t)を周波数スペクトルFP(ω)に変換するステップと、周波数スペクトルFH(ω)の中から水の共鳴周波数に相当する周波数f1Hを取得し、周波数スペクトルFP(ω)の中からリン化合物の共鳴周波数に相当する周波数f1Pを取得するステップと、水の共鳴周波数の変化量と温度との間の相関関係を利用して、周波数f1Hの変化量ΔfHと、周波数f1Pの変化量ΔfPとの差に応じた温度変化を検出するステップとを備える。【選択図】図8
