By a News Reporter-Staff News Editor at Health & Medicine Week -- Current study results on Health and Medicine have been published. According to news reporting originating in Osaka, Japan, by NewsRx journalists, research stated, "Our purpose in this study was to investigate the usefulness of a method for controlling the temperature rise in magnetic hyperthermia (MH) using an external static magnetic field (SMF), and to derive an empirical equation for describing the energy dissipation of magnetic nanoparticles (MNPs) in the presence of both the alternating magnetic field (AMF) and SMF through phantom experiments. We made a device that allows for MH in the presence of an SMF with a field-free point (FFP) using a Maxwell coil pair."
The news reporters obtained a quote from the research from Osaka University, "We measured the temperature rise of MNPs under various conditions of AMP and SMF and various distances from the FFP (d), and calculated the specific absorption rate (SAR) from the initial slope of the temperature curve. The SAR values decreased with increasing strength of SMF (H-s) and d. The extent of their decrease with d increased with an increase of the gradient of SMF (G(s)). The relationships between SAR and H-s and between SAR and d could be well approximated by Rosensweig's equation in which the amplitude of AMF (H-ac) is replaced by H-ac(2)/root H-ac(2) + H-s(2) except for the case when G(s) was small."
According to the news reporters, the research concluded: "The use of an external SMF with an FFP will be effective for controlling the temperature rise in MH in order to reduce the risk of heating surrounding healthy tissues, and our empirical equation will be useful for estimating SAR in the presence of both the AMF and SMF and for designing an effective local heating system for MH."
For more information on this research see: Control of the temperature rise in magnetic hyperthermia with use of an external static magnetic field. Physica Medica-European Journal of Medical Physics, 2013;29(6):624-630. Physica Medica-European Journal of Medical Physics can be contacted at: Elsevier Sci Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, Oxon, England (see also Health and Medicine).
Our news correspondents report that additional information may be obtained by contacting K. Murase, Osaka University, Dept. of Med Phys & Engn, Div Med Technol & Sci, Fac Hlth SciGrad Sch Med, Suita, Osaka 5650871, Japan. Additional authors for this research include H. Takata, Y. Takeuchi and S. Saito.
Keywords for this news article include: Asia, Osaka, Japan, Health and Medicine
Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2013, NewsRx LLC