By a News Reporter-Staff News Editor at Health & Medicine Week -- Investigators publish new report on Radiology. According to news reporting out of Osaka, Japan, by NewsRx editors, research stated, "Our purpose in this study was to investigate the behavior of signal harmonics in magnetic particle imaging (MPI) by experimental and simulation studies. In the experimental studies, we made an apparatus for MPI in which both a drive magnetic field (DMF) and a selection magnetic field (SMF) were generated with a Maxwell coil pair."
Our news journalists obtained a quote from the research from Osaka University, "The MPI signals from magnetic nanoparticles (MNPs) were detected with a solenoid coil. The odd-and even-numbered harmonics were calculated by Fourier transformation with or without background subtraction. The particle size of the MNPs was measured by transmission electron microscopy (TEM), dynamic light-scattering, and X-ray diffraction methods. In the simulation studies, the magnetization and particle size distribution of MNPs were assumed to obey the Langevin theory of paramagnetism and a log-normal distribution, respectively. The odd-and even-numbered harmonics were calculated by Fourier transformation under various conditions of DMF and SMF and for three different particle sizes. The behavior of the harmonics largely depended on the size of the MNPs. When we used the particle size obtained from the TEM image, the simulation results were most similar to the experimental results. The similarity between the experimental and simulation results for the even-numbered harmonics was better than that for the odd-numbered harmonics. This was considered to be due to the fact that the odd-numbered harmonics were more sensitive to background subtraction than were the even-numbered harmonics."
According to the news editors, the research concluded: "This study will be useful for a better understanding, optimization, and development of MPI and for designing MNPs appropriate for MPI."
For more information on this research see: Experimental and simulation studies on the behavior of signal harmonics in magnetic particle imaging. Radiological Physics and Technology, 2013;6(2):399-414. Radiological Physics and Technology can be contacted at: Springer, 233 Spring Street, New York, NY 10013, USA. (Springer - www.springer.com; Radiological Physics and Technology - www.springerlink.com/content/1865-0333/)
Our news journalists report that additional information may be obtained by contacting K. Murase, Division of Medical Technology and Science, Dept. of Medical Physics and Engineering, Faculty of Health Science, Graduate School of Medicine, Osaka University, 1-7 Yamadaoka, Suita, Osaka 565-0871, Japan. Additional authors for this research include T. Konishi, Y. Takeuchi, H. Takata and S. Saito (see also Radiology).
Publisher contact information for the journal Radiological Physics and Technology is: Springer, 233 Spring Street, New York, NY 10013, USA.
Keywords for this news article include: Asia, Osaka, Japan, Radiology.
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