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Figure 4. Graph of calculated (line) and experimental () values of temperature elevation as a function of magnetic field amplitude in breast tissue after an exposure time of 2 minutes. The functional dependency is calculated as follows: T = 0.26°C/(kA/m)³ · H³, with r² = 0.95, where T is the temperature elevation and H is the magnetic field amplitude. The data, which are based on an alternating current magnetic field with a 400-kHz frequency and a magnetite mass (sample 6) of 28 mg, show that the relationship between temperature elevation and magnetic field amplitude is described by a third-order power law of dependency. The vertical error bars represent the SD from the mean temperature elevations. Experiments were performed in triplicate.