Discussion of Estimating Multiple Sources Based on Three- Dimensional Magnetocardiograms Measurement

AbstractA SQUID magnetometer system with three-dimensional(3-D) second-order gradiometer was used to measure the magnetocardiograms(MCG) for the normal subject and the patient with myocardial infarction (MI). The multiple sources were estimated using the single current dipole model based on the 3-D MCG measurement. The difference between the normal subject and the patient with MI was discussed in the conduction pathways. It is helpful to discriminate the location and the direction of multiple sources based on combining Bz component with Bx and By components. The 3-D MCG measurement may be more efficient than the 1-D MCG measurement in estimating the multiple sources

Evaluation of Patient with Myocardial Infarction Using Isoenergy Contour Maps of Three-Dimensional Magnetocardiograms

AbstractA SQUID magnetometer system with three-dimensional(3-D) second-order gradiometer was used to measure the magnetocardiograms(MCG) for the normal subject and the patient with myocardial infarction (MI). In order to discuss the activities of the heart between the normal subject and the patient with MI, we have presented the isoenergy contour maps to evaluate the spatial energy distribution (SED) of the QRS complex at different scale. Being different from the normal subject, the patient with MI represented different the pattern of the SED in various frequency band for the ST segment of the QRS complexof Bx, By, and Bz components. It is helpful to evaluate the patient with MI using the isoenergy contour maps of 3-D MCG