Patent ID: 9301693
Filing Date: 2016-04-05
CPC Classification: A61B,G01K,G06F

Claim Text:
1. A method for in-vivo temperature measurement, comprising steps of: (1) positioning a magnetic nano agent at an area of a measured object; (2) applying an AC excitation magnetic field to said area; (3) collecting an AC magnetization signal of said magnetic nano agent under said AC excitation magnetic field using a coil sensor and processing the AC magnetization signal via a data acquisition card; (4) detecting amplitudes C (5) calculating in-vivo temperature T according to equation X=AY, wherein said amplitudes of said odd harmonics form a column vector wherein a coefficient matrix A is defined by expressing said AC magnetization signal via Langevin's function, and deducing an expression of said amplitudes of said odd harmonics from a Taylor series expansion of the Langevin's function, thereby obtaining said coefficient matrix  where M wherein a related column vector Y of said in-vivo temperature is expressed as  where T is said in-vivo temperature of said measured object, and N is magnetic nano concentration at said measured object.