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Figure 4 | BioMedical Engineering OnLine

Figure 4

From: Finite volume analysis of temperature effects induced by active MRI implants: 2. Defects on active MRI implants causing hot spots

Figure 4

Theoretical final temperature increases around a spherical power source for various power losses. All five curves start at a radial distance r = 50 μm from the hot spot center, because 50 μm is the typical wire radius. It is assumed that the hot spot is surrounded by tissue only. For power losses of 2 mW or more the temperature increases exceed 5 K. Because of the cubic dependence of the critical volume on the critical radius the critical volume is substantial for power losses above 10 mW.

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