Premium
Heating of cardiovascular stents in intense radiofrequency magnetic fields
Author(s) -
Foster Kenneth R.,
Goldberg Robert,
Bonsignore Craig
Publication year - 1999
Publication title -
bioelectromagnetics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.435
H-Index - 81
eISSN - 1521-186X
pISSN - 0197-8462
DOI - 10.1002/(sici)1521-186x(1999)20:2<112::aid-bem5>3.0.co;2-k
Subject(s) - bioelectromagnetics , magnetic field , electromagnetic coil , induction heating , inductance , materials science , nuclear magnetic resonance , stent , field (mathematics) , physics , electrical engineering , radiology , engineering , medicine , voltage , mathematics , quantum mechanics , pure mathematics
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. Bioelectromagnetics 20:112–116, 1999. © 1999 Wiley‐Liss, Inc.