TEMPERATURE MEASUREMENT METHOD AND MAGNETIC FIELD MEASUREMENT METHOD

摘要

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 f(t) detected from a subject into a frequency spectrum F(ω) by application of a high frequency magnetic field including the resonant frequency of water, and converting a magnetic resonance signal f(t) detected from the subject into a frequency spectrum F(ω) by application of a high frequency magnetic field including the resonant frequency of a phosphorus compound; a step of acquiring a frequency fcorresponding to the resonant frequency of water from the frequency spectrum F(ω), and acquiring a frequency fcorresponding to the resonant frequency of the phosphorus compound from the frequency spectrum F(ω); and a step of detecting a temperature change according to a difference between a variation amount Δfof the frequency fand a variation amount Δfof the frequency fby using correlation between a variation amount of the resonant frequency of water and a temperature.SELECTED DRAWING: Figure 8