International Journal on Magnetic Particle Imaging
Vol 8 No 1 Suppl 1 (2022): Int J Mag Part Imag

Short Abstracts

Displacement measurement of magnetic particles by ultrasonic vibration

Main Article Content

Katsuya Yaginuma  


Signal detection methods of conventional magnetic particle imaging (MPI) require large coils and multiple power supplies for detecting signals from magnetic nanoparticles (MNPs). In connection to this, there is a concern about the safety of the living body. Therefore, a new signal detection method based on the vibration of MNPs has been proposed in this study. Further, to establish this method using ultrasonic vibration, the displacement of the MNPs by a focused ultrasonic transducer has been evaluated using experiment and the finite element method. Iron oxide particles have been used instead of MNPs to investigate whether ultrasonic waves can be used for generating vibrations in a simulated biological object. From the experimental results, the displacement of the iron oxide particles in agar has been observed to be approximately 51.8 μm, which is different from the simulation results, indicating that the finite element model requires improvement to match the experimental conditions.

Article Details


[1] B. Gleich, J. Weizenecker, Tomographic imaging using the nonlinear response of magnetic particles, Nature, 435, pp. 1214–1217, 2005.
[2] A. Matsuhisa, T. Hatsuda, T. Takagi, M. Arayama and Y. Ishihara. Magnetic signal detection method based on active vibration of magnetic nanoparticles. In 6th International Workshop on Magnetic Particle Imaging, Lübeck, 2016.