Flat treatment pads versus bulky body coils?
Additional disadvantage of large coil systems is that the magnetic field is very localized and mainly within the coil area only and not suitable for full body energizing. Many manufacturers use the latter method due to technological difficulties and complications in manufacturing and controlling high-density electrical currents within flat surface coils. Also creating stable and effective electromagnetic fields exceeding by far the 10 milli Tesla (100 gauss) level seems to be problematic for other manufacturers.
