The lateral distance from the center of the accessory along the scan line, measured in centimeters. All measurements are taken at a fixed standoff distance from the coil face. Readings begin at Center (0 cm) and extend outward in defined increments toward the edge of the accessory.
The field is strongest right at the coil and weakens with distance in every direction. On the on-axis dipole model the report uses, it reaches half its peak strength at about three quarters of a coil radius from center and one tenth at about two radii. A larger coil holds the field up farther out.
