Research Article

The Magnetic Field Produced by the Heart and Its Influence on MRI

Figure 1

The model of a spherical heart. Part of the spherical shell has been cut out to show the heart wall. The black curves indicate the fiber orientation. The pink tissue has a transmembrane potential of 20 mV, and the blue tissue has a transmembrane potential of −80 mV. The green curve shows the magnetic field. The endocardial (inner) surface has radius , and the epicardial (outer) surface has radius .