Patrick Vogel

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Most 3-D magnetic particle imaging (MPI) scanners currently use permanent magnets to create the strong gradient field required for high resolution MPI. However, using permanent magnets limits the field of view (FOV) due to the large amount of energy required to move the field free point (FFP) from the center of the scanner. To address this issue, an(More)
While magnetic particle imaging (MPI) constitutes a novel biomedical imaging technique for tracking superparamagnetic nanoparticles in vivo, unlike magnetic resonance imaging (MRI), it cannot provide anatomical background information. Until now these two modalities have been performed in separate scanners and image co-registration has been hampered by the(More)
Current simulations of the signal in magnetic particle imaging (MPI) are either based on the Langevin function or on directly measuring the system function. The former completely ignores the influence of finite relaxation times of magnetic particles, and the latter requires time-consuming reference scans with an existing MPI scanner. Therefore, the(More)
The traveling wave magnetic particle imaging (TWMPI) scanner [1] is a progression of the common MPI approach [2]. It uses a dynamic linear gradient array (dLGA) for generating and moving a fi eld free point (FFP) linearly along the z-axis. With additional perpendicular saddle coils the FFP can be moved arbitrarily through a 3D volume. Using the(More)
Determining the composition of solid materials is of high interest in areas such as material research or quality assurance. There are several modalities at disposal with which various parameters of the material can be observed, but of those only magnetic resonance imaging (MRI) or computer tomography (CT) offer a non-destructive determination of material(More)
The traveling wave approach is an alternative magnetic particle imaging (MPI [1]) scanner design for a fast determination of the distribution of superparamagnetic iron-oxide nanoparticles in 3D [2]. It uses a dynamic linear gradient array (dLGA) for generating and moving a fi eld free point (FFP) linearly along the symmetry axis (z-axis). With additional(More)