ABSTRACT
Since the rst detection of the magnetocardiogram (MCG) in 1963 by G. M. Baule and R. McFee, new diagnostic information from biomagnetic signals has been widely anticipated. In bioelectromagnetism, this means that when electrically active tissue produces a bioelectric eld, it simultaneously produces a biomagnetic eld as well. Sensitivity distribution of a lead system that detects the magnetic dipole moment of a volume source also consists of three orthogonal components. Diagnostic performances of ECG and MCG were compared in an extensive study made at Tampere University of Technology. In a cylindrically symmetrical volume conductor model, the lead eld ow lines are concentric circles and do not cut the discontinuity boundaries. To indicate the magnetometer’s ability to concentrate its sensitivity to a small region, the concept of halfsensitivity volume has been denied.
