NATO Advanced Study Institute:
David Cohen p. 327. (1983) describes Biomagnetism as the study of magnetic fields that originate in the biological system. In 1967 research was conducted into measuring human biomagnetism and external sources were interfering with measurements so investigators developed magnetically shielded rooms. The original room consisted of two layers of ferromagnetic shielding and one layer of aluminum. Today, magnetic and eddy currents are set up in the walls to cancel out any outside fields.
Zimmerman developed a magnetic field sensor In 1970. The Super conducting Quantum Interference Device goes by the acronym SQUID. It can only operate below a specific temperature and thus requires a cryogenic bath of liquid helium. This device is able to detect human fields as follows: Body Part Picola Tesla/ cm
fasting abdomen 0-50
after eating 50
cold drink 100-200
post polio 0
17th week 10
Steady magnetic fields of the human body are produced in two ways: currents in the body and by magnetic material like that of magnetite in the lungs of asbestos miners which is about 10-9 T. Also, welders can have abnormally high amounts of iron in their lungs.
Normal electrophysiological processes produce measurable magnetic fields that can then be compared to injured sites. Hence, this information can be used for diagnosis. Anticancer Research, 18 (5B): 1998 Sept-Oct highlights a study into biomagnetic activity in ovarian lesions. The SQUID is used to diagnosis benign versus malignant ovarian diseases.
Furthermore, Chigong Masters project biomagnetism that can also be measured by simple deflection of a compass.
HOME | BTA | BI | BRC | MM