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Laser‐induced thermal response and characterization of nanoparticles for cancer treatment using magnetic resonance thermal imaging
Author(s) -
Elliott Andrew M.,
Stafford R. Jason,
Schwartz Jon,
Wang James,
Shetty Anil M.,
Bourgoyne Chirs,
O'Neal Patrick,
Hazle John D.
Publication year - 2007
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.2733801
Subject(s) - materials science , imaging phantom , nanoshell , nanoparticle , fluence , magnetic resonance imaging , laser , nuclear magnetic resonance , photothermal therapy , characterization (materials science) , medical imaging , optics , nanotechnology , biomedical engineering , radiology , medicine , physics
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.