In vivo temperature measuring method and system based on alternating magnetization intensity of magnetic nanoparticles
A measurement method and technology of magnetization, applied in body temperature measurement, thermometers and thermometers using electric/magnetic elements that are directly sensitive to heat, can solve temperature measurement errors, difficulty in measuring the concentration distribution of magnetic nanoparticles, and no measurement scheme proposed And other issues
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[0135] 1. Simulation model and test description:
[0136] In order to study the effectiveness and optimal design of the temperature test scheme, this example uses the simulation data containing noise to test the algorithm experimentally. The effective magnetic moment M of reagent particles used in the simulation test s measured as 4 x 10 -19 (Supplementary note that the measured value of the effective magnetic moment is determined by the reagent type parameter). Considering the error effect brought by the Fourier series quaternary approximation model of AC magnetization, it is necessary to use a weak AC excitation magnetic field amplitude. In this example, the AC excitation magnetic field amplitude H 0 = 100Oe. The noise model uses the awgn function in MATLAB to directly add the noise with a preset signal-to-noise ratio to the AC magnetization of the sampled signal. The signal-to-noise ratio included in the temperature measurement process is set to 80dB. According to diffe...
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