title: Pseudo current density maps of electrophysiological heart, nerve or brain function and their physical basis.
abstract: BACKGROUND
  In recent years the visualization of biomagnetic measurement data by so-called pseudo current density maps or Hosaka-Cohen (HC) transformations became popular.
  
  
  METHODS
  The physical basis of these intuitive maps is clarified by means of analytically solvable problems.
  
  
  RESULTS
  Examples in magnetocardiography, magnetoencephalography and magnetoneurography demonstrate the usefulness of this method.
  
  
  CONCLUSIONS
  Hardware realizations of the HC-transformation and some similar transformations are discussed which could advantageously support cross-platform comparability of biomagnetic measurements.
authors.affiliation: Physikalisch-Technische Bundesanstalt, Berlin, Germany. wolfgang.haberkorn@ptb.de
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Haberkorn
authors.forename: Uwe
authors.initials: U
authors.lastname: Steinhoff
authors.forename: Martin
authors.initials: M
authors.lastname: Burghoff
authors.forename: Olaf
authors.initials: O
authors.lastname: Kosch
authors.forename: Andreas
authors.initials: A
authors.lastname: Morguet
authors.forename: Hans
authors.initials: H
authors.lastname: Koch