Title :
Biomagnetic susceptometer with SQUID instrumentation
Author :
Paulson, D.N. ; Fagaly, R.L. ; Toussaint, R.M. ; Fischer, R.
Author_Institution :
Biomagnetic Technol. Inc., San Diego, CA, USA
fDate :
3/1/1991 12:00:00 AM
Abstract :
A novel SQUID magnetometer for noninvasive measurements of hepatic (liver) iron stores is discussed. Placement of the SQUID, detection coil, and magnet in the dewar vacuum region significantly reduced system noise. In addition, the system incorporates multiple magnets and detection coils which may allow the discrimination of the surface skin layer from the deeper (weaker signal) true liver iron concentration. Measurements indicate an instrumental noise level that is <20 μg/g of equivalent iron concentration
Keywords :
SQUIDs; biomagnetism; iron; liver; magnetic susceptibility; magnetometers; patient diagnosis; SQUID instrumentation; SQUID magnetometer; biomagnetic susceptometer; detection coils; dewar vacuum; hepatic Fe stores; instrumental noise level; liver Fe stores; multiple magnets; noninvasive measurements; system noise; Biomagnetics; Coils; Instruments; Iron; Liver; Noise reduction; Noninvasive treatment; SQUID magnetometers; Skin; Vacuum systems;
Journal_Title :
Magnetics, IEEE Transactions on
