Fig. 4

Comparison of typical SAR and temperature patterns gained with the SIGMA-60 applicator (left) and the SIGMA-Eye applicator (right). In the SIGMA-60 the pelvic region is more effectively heated, while the upper abdomen is better covered in the SIGMA-Eye applicator. The dorsal temperature hotspot represents a local effect on the border of bone and fatty tissue with no consequence for nearby structures, particularly there is no critical temperature enhancement in the bony shielded spinal canal