Dosimetry. a) Examples for groups of 7 mice inside a cage (Pin = 35 W): Electric field distribution for a 15° sector of the radial waveguide. Higher field values occur due to the field concentration at the metal ribs between the cages (cf. fig. 1b). b) Example for insertion of an anatomical mice model into the group of ellipsoids: Localized SAR distribution (SARwb = 366 mW/kg, resolution: 1.2 mm (voxel size)). The overall maximum of SARvoxel = 5.9 W/kg is not located in the cuts shown here.