Magnetometric Estimation of Lung Dust Loads by Applying a Reversed Magnetizing Field

Ferdinand Krutý1, Ivan Šimácek2, and Ján Manka2

1 Clinic of Labor Medicine and Toxicology, Comenius University, Medical School, Bratislava, Slovakia
2 Institute of Measurement Science, Slovak Academy of Sciences, Bratislava, Slovakia

Corresponding author: Doc. MUDr. Ferdinand Krutý, CSc.
    Klinika pracovného lekárstva a toxikológie LFUK
    Dumbierska 3, 831 01 Bratislava, Slovakia.
    Telephone: (+421) 7 5477 3828
    Fax number: (+421) 7 5954 6237
    E-mail: kruty@healthnet.sk

CEJOEM 1999, Vol.5. No.3-4.:324-331


Key words:
Non-invasive biomagnetometry, SQUID, human lungs, ferromagnetic particles, arc welders

Abbreviations:
SQUID = Superconducting Quantum Interference Device
FMP = powder ferromagnetic particles
DC = direct current
RF = radiofrequency
SEM = standard error of the mean


Abstract:
A measuring method using SQUID gradiometric system for measurement of magnetic dust loads of the lungs is described. Two active arc welders and one control were the studied subjects. Based upon the experimental results we report using the reversed magnetizing field for verifiable monitoring of dust particles with ferromagnetic properties in living tissue. We present the response of the remanent magnetic induction for ferromagnetic contaminants in the lungs of the subject. An evident difference in the remanent magnetic induction between arc welders and the control was observed.


Received:  01 November 1999
Accepted:  09 February 2000

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