title: Laser-induced thermal response and characterization of nanoparticles for cancer treatment using magnetic resonance thermal imaging.
abstract: Spherical nanoparticles with a gold outer shell and silica core can be tuned to absorb near-infrared light of a specific wavelength. These nanoparticles have the potential to enhance the treatment efficacy of laser-induced thermal therapy (LITT). In order to enhance both the potential efficacy and safety of such procedures, accurate methods of treatment planning are needed to predict the temperature distribution associated with treatment application. In this work, the standard diffusion approximation was used to model the laser fluence in phantoms containing different concentrations of nanoparticles, and the temperature distribution within the phantom was simulated in three-dimensions using the finite element technique. Magnetic resonance temperature imaging was used to visualize the spatiotemporal distribution of the temperature in the phantoms. In most cases, excellent correlation is demonstrated between the simulations and the experiment (<3.0% mean error observed). This has significant implications for the treatment planning of LITT treatments using gold-silica nanoshells.
authors.affiliation: Department of Imaging Physics, The University of Texas, M. D. Anderson Cancer Center Houston, Texas 77030, USA.
authors.forename: Andrew M
authors.initials: AM
authors.lastname: Elliott
authors.forename: R Jason
authors.initials: RJ
authors.lastname: Stafford
authors.forename: Jon
authors.initials: J
authors.lastname: Schwartz
authors.forename: James
authors.initials: J
authors.lastname: Wang
authors.forename: Anil M
authors.initials: AM
authors.lastname: Shetty
authors.forename: Chirs
authors.initials: C
authors.lastname: Bourgoyne
authors.forename: Patrick
authors.initials: P
authors.lastname: O'Neal
authors.forename: John D
authors.initials: JD
authors.lastname: Hazle
mesh_terms: D006046:Gold; D006801:Humans; D007834:Lasers; D008279:Magnetic Resonance Imaging; D009682:Magnetic Resonance Spectroscopy; D053758:Nanoparticles; D009369:Neoplasms