Modeling and Measurement of the Nonlinear Force on Nanoparticles in Magnetomotive Techniques

Displacement Patterns in Magnetomotive Ultrasound Explored by Finite Element Analysis

“…This approach provides a reasonable approximation of the non-linear behavior that can be used to model the displacement amplitude. In other applications, where the harmonics are of central interest (Kranemann et al 2020), magnetization data from the study system should be used.…”

Magnetomotive Ultrasound Imaging Systems: Basic Principles and First Applications

“…An interesting prospect is to combine a strong permanent magnet with an electromagnet to generate a varying field superimposed on the static. While the optimal field characteristics are different, a similar magnet configuration has been suggested for MMUS, specifically to harvest the non-linearity of particle magnetization (Kranemann et al 2020). Seeing how the force is proportional to the field times its gradient, this product can be increased by the addition of a permanent magnet, which is desirable, as it would make it possible to extend the imaging depth.…”

“…Reducing the current would alleviate the problem with heating but also diminish the force and magnetomotion. An approach to circumvent this is to separate the field into one static and one dynamic component and superimpose the fields from permanent and current driven magnets (Kranemann et al 2020). The object to be imaged is placed inside a bore surrounded by a coil and permanent magnets.…”

“…The object to be imaged is placed inside a bore surrounded by a coil and permanent magnets. Therefore the size limit of what can be imaged is set by the diameter of the coil, in this case 34 mm (Kranemann et al 2020).…”

Magnetic particles in motion: magneto-motive imaging and sensing

“…In magneto-motive imaging, contrast is generated through magnetically-induced motion 30 - 35 . When an external magnetic field is applied to a target labeled with MNPs, the magnetically-labeled target undergoes distinct motion compared to the background tissue.…”