Patent ID: 8498837
Filing Date: 2013-07-30
Classification: A61B,G01K,G01R

Abstract:
1. A method for paramagnetism-based remote temperature measurement of a measured object using magnetic nanoparticles, comprising: (1) positioning a sample of said magnetic nanoparticles at an area of said measured object; (2) applying n times of different excited magnetic fields on said area, where n≧2; (3) collecting magnetization of said sample under said different excited magnetic fields, and detecting magnetic susceptibility of said sample under said different excited magnetic fields according to said magnetization; (4) constructing equations between said magnetic susceptibility and said different excited magnetic fields wherein; χ c 2j-1 is a polynomial coefficient; J+1 is a predetermined polynomial expansion term; N is concentration of said sample; M is atomic magnetic moment of said sample; k is a Boltzmann's constant; and T is temperature of said measured object; 5) solving said equations, using a processor, to obtain said temperature T, wherein J=1, and step (5) comprises: using a linear equation to perform curve fitting on a sequence point and calculating said temperature according to an intercept 3x and a slope of a straight line obtained by said curve fitting: