Investigation of the Magnetic Properties of Ni Microparticles for the Utilisation in Magnetopneumography

Magnetopneumography is the method of investigation of the contamination and of the clearing mechanism of the human lungs based on the measurement of the remanent magnetic moment of the magnetised contaminating ferromagnetic particles in the lung. The aim of this work was to find the optimal conditions which enables to provide the most precise quantification of contaminating ferromagnetic particles in the human lungs. The magnetisation and the relaxation process of spherical Ni particles was investigated with special attention to the influence of the magnetisation time, the size and the concentration of the particles and to the viscosity of carrying medium. From the gained results the optimal conditions were concluded and into the praxis implemented.