Comments on "Capabilities of Multi-Applicator Systems for Focused Hyperthermia"

In the above paper, the author has incorrectly assumed that aperture size must be limited to a lateral dimension of not less than one wavelength in fat tissue in order to prevent excessive heating of superficial fat. The reference cited to support this conclusion [1] did not make such a generalization, but rather provided an example which implied this restriction at a particular frequency and with a certain aperture size. In actually, however, focussed co-phased applicators are useful across a much broader range than Knoechel has suggested.