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262   Computational Modeling in Biomedical Engineering and Medical Physics




























                Figure 8.6 The isotherms of 45 C (the ablated volume), 60 C, and 80 C. GHT (left) and BHT models.
                Values are in degrees Celsius. BHT, Bioheat transfer; GHT, general heat transfer.
                   Numerical simulation unveils the underlying mechanisms of heat generation and the
                transfer of this procedure. It convincingly evidences the discrepancies between the ther-
                mal loads in the two models (temperature field, power levels, etc.) and the pending
                hypothermic or ablative effects. This information is particularly important to thermally
                approach the tumor volume and to avoid the surrounding healthy tissue perturbation.





























                Figure 8.7 The average temperature of the ROI volume. ROI, Region of interest.
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