14.S MEG Spherical Model
14.X PLANAR GRADIOMETER SENSITIVITY DISTRIBUTION IN SPHERICAL MODEL
Figure 14.5X. Isosensitivity lines (dashed lines) and half-sensitivity volume for a planar gradiometer calculated for the spherical Rush-Driscoll head model. Lead field current flow lines are drawn with thin solid lines. They are accurate solutions.
- A) In the xz-plane the zero sensitivity line approaches asymptotically the line which makes a 35.27° angle with respect to the z-axis.
- B) In the yz-plane the isosensitivity lines approach concentric circles at long distances concentric circles.