Variation of radio frequency induced power deposition due to second surrounding tissue

We investigated RF-induced power deposition (p) generated by insulated leads with different lengths located in proximity to two tissues. The first tissue surrounding the leads was shaped as a cylinder with a diameter of 11 mm and located in a very large box filled with the second tissue. Lead electromagnetic models and p substantially depended on electrical properties of both tissues. If the cylinder and the box were filled with the same tissue, discrepancy to results of the two-tissue setup was up to 280%.