Temperature maps associated with the uSAF HT treatment for tumours #3–#6 and frequencies 127.7, 400.2, 596.1 and 894.1 MHz. The slices shown are transverse and sagittal views of the temperature volume though the centre of the tumours. Input SAR maps are scaled so as to achieve a maximum temperature of 45 degrees at the end of the 30-min HT treatment. Note that the maximum temperature is not necessarily achieved inside the tumour. Contours of the head and the target tumour ROI are shown in green. The white numbers indicate the temperature amplification ratio, which is the ratio of the average temperature increase inside and outside the tumour. Temperature amplification ratios are computed for the whole head and are, therefore, the same for the transverse and sagittal views.