Fig. 7.

Results showing the B₁⁺ transmit field and temperature map when heating is applied via coil Channel 2. a) shows the relative temperature changes at the edge of the phantom (30 mm inside), as measured by the fibre optic probe, versus simulation and PRF (using a 4 voxel ROI); uncertainties caused by the PRF alpha coefficient are displayed with error bars, and the total uncertainties in the simulation analysed in Table 2 are also highlighted in purple. Temperature measurements using fibre optic probes from different experimental dates on under identical conditions are plotted to indicate a potential error for the period between 600 s and 900 s. b) shows the measured B₁⁺ field and PRF, and c) shows the results of their respective simulation. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)