Document Detail


Combined use of transcranial magnetic stimulation and metal electrode implants: a theoretical assessment of safety considerations.
MedLine Citation:
PMID:  23135209     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
This paper provides a theoretical assessment of the safety considerations encountered in the simultaneous use of transcranial magnetic stimulation (TMS) and neurological interventions involving implanted metallic electrodes, such as electrocorticography. Metal implants are subject to magnetic forces due to fast alternating magnetic fields produced by the TMS coil. The question of whether the mechanical movement of the implants leads to irreversible damage of brain tissue is addressed by an electromagnetic simulation which quantifies the magnitude of imposed magnetic forces. The assessment is followed by a careful mechanical analysis determining the maximum tolerable force which does not cause irreversible tissue damage. Results of this investigation provide useful information on the range of TMS stimulator output powers which can be safely used in patients having metallic implants. It is shown that conventional TMS applications can be considered safe when applied on patients with typical electrode implants as the induced stress in the brain tissue remains well below the limit of tissue damage.
Authors:
Laleh Golestanirad; Hossein Rouhani; Behzad Elahi; Kamal Shahim; Robert Chen; Juan R Mosig; Claudio Pollo; Simon J Graham
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-11-08
Journal Detail:
Title:  Physics in medicine and biology     Volume:  57     ISSN:  1361-6560     ISO Abbreviation:  Phys Med Biol     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-11-8     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0401220     Medline TA:  Phys Med Biol     Country:  -    
Other Details:
Languages:  ENG     Pagination:  7813-7827     Citation Subset:  -    
Affiliation:
Sunnybrook Research Institute and Department of Medical Biophysics, University of Toronto, Toronto, Canada. Laboratory of Electromagnetics and Acoustics, École Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland.
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