SQUID magnetopneumography used to estimate the ferromagnetic particle content in the human lungs

A number of possibilities for quantifying the ferromagnetic particle contamination in human lungs with the help of RF SQUID system are studied. A tool for the analysis of the quantification of the measured data is developed. Moreover, the conditions for the calculation of the particle concentration in human lungs from the measured remanent magnetic induction are discussed. The theoretical calculations were verified by measuring on physical model of lungs. Lastly, the estimation of the concentration of ferromagnetic particles in the lungs of arc welders with contaminated lungs is addressed.