Title :
Analysis of MCG measured by high-Tc SQUID with spatial filter method
Author :
Sai, K.Y. ; Zhen, Y.Q. ; Uchikawa, Y. ; Kotani, M.
Author_Institution :
Dept. of Electron. Eng., Tokyo Denki Univ., Japan
fDate :
9/1/2000 12:00:00 AM
Abstract :
Magnetocardiogram (MCG) measurement using high-Tc SQUID magnetometer is receiving attention as a diagnostic technique because the instrument is easy to operate and the liquid nitrogen coolant is lower cost compared with the liquid helium used in conventional SQUID magnetometers. We measured of the linear current and MCG of the subjects with healthy and unhealthy hearts using a 16-channel high-Tc SQUID in a prefabricated magnetically shielded room. The spatial filter method (SFM) is used to reduce the errors in the measurement and analyzes of the signal source. The results of the simulation and actual measurement of the subjects with healthy and unhealthy hearts show that the method is useful for the estimation of the signal source
Keywords :
SQUID magnetometers; high-temperature superconductors; magnetocardiography; medical signal processing; spatial filters; diagnostic instrument; heart disease; high-Tc SQUID magnetometer; linear current; liquid nitrogen coolant; magnetically shielded room; magnetocardiogram measurement; signal source analysis; spatial filter method; Coolants; Costs; Heart; Helium; Instruments; Magnetic analysis; Magnetic separation; Nitrogen; SQUID magnetometers; Spatial filters;
Journal_Title :
Magnetics, IEEE Transactions on
