Foster K R, Goldberg R, Bonsignore C
Department of Bioengineering, University of Pennsylvania, Philadelphia 19104-6392, USA.
Bioelectromagnetics. 1999;20(2):112-6.
We consider the heating of a metal stent in an alternating magnetic field from an induction heating furnace. An approximate theoretical analysis is conducted to estimate the magnetic field strength needed to produce substantial temperature increases. Experiments of stent heating in industrial furnaces are reported, which confirm the model. The results show that magnetic fields inside inductance furnaces are capable of significantly heating stents. However, the fields fall off very quickly with distance and in most locations outside the heating coil, field levels are far too small to produce significant heating. The ANSI/IEEE C95.1-1992 limits for human exposure to alternating magnetic fields provide adequate protection against potential excessive heating of the stents.
我们考虑在感应加热炉的交变磁场中对金属支架进行加热。进行了近似理论分析，以估算产生显著温度升高所需的磁场强度。报告了在工业炉中对支架加热的实验，这些实验证实了该模型。结果表明，感应炉内的磁场能够显著加热支架。然而，磁场随距离迅速衰减，在加热线圈外部的大多数位置，场强太小，无法产生显著加热。ANSI/IEEE C95.1 - 1992规定的人体暴露于交变磁场的限值为防止支架可能过度受热提供了充分的保护。
