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Figure 3. Graph of calculated (line) and experimental () values of temperature elevation as a function of magnetite mass in breast tissue after an exposure time of 2 minutes. The functional dependency for sample 6 magnetite masses of up to 28 mg is calculated as follows: T = 2.31 · M, with r² = 0.97, where M is the mass of magnetite and T is the temperature elevation. The data, which are based on an alternating current magnetic field with a 400-kHz frequency and 6.5-kA/m amplitude, show that the temperature elevation as a function of magnetite mass increases linearly (r² = 0.97) with a mass of up to about 28 mg; at higher masses, the temperature elevation saturates. The vertical error bars represent the SD from the mean temperature elevations. Experiments were performed in triplicate.