title: Potential hazards of radiative electromagnetic hyperthermia in the presence of multiple metallic surgical clips.
abstract: Three-dimensional computer simulations of a patient under consideration for heating by the BSD Sigma 60 phased array applicator showed marked specific absorption rate (SAR) enhancement in the region where there was a concentration of metallic surgical clips. Subsequent tests in tissue-equivalent phantom material confirmed that metallic objects much shorter than the wavelength in tissue of the radiative electromagnetic field can cause significant changes in the power deposition near the implanted metal. The placement of extensive numbers of surgical clips may therefore hinder the ability to subsequently utilize radiative electromagnetic heating modalities.
authors: Department of Radiation Oncology, Stanford University School of Medicine, CA 94305.
authors: E R
authors: ER
authors: Lee
authors: D M
authors: DM
authors: Sullivan
authors: D S
authors: DS
authors: Kapp
mesh_terms: D000328:Adult; D003198:Computer Simulation; D055590:Electromagnetic Phenomena; D005260:Female; D005706:Gallbladder Neoplasms / Q000601:surgery / Q000628:therapy; D006801:Humans; D006979:Hyperthermia, Induced / Q000009:adverse effects* / Q000295:instrumentation / Q000379:methods; D008545:Melanoma / Q000601:surgery / Q000628:therapy; D008670:Metals; D008961:Models, Structural; D019736:Prostheses and Implants / Q000009:adverse effects; D013523:Surgical Equipment / Q000009:adverse effects*; D013696:Temperature
chemical_list: D008670:Metals