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• W2234498748 endingPage "045007" @default.
• W2234498748 startingPage "045007" @default.
• W2234498748 abstract "In magnetic particle imaging, scanners use different spatial sampling techniques to cover the field of view (FOV). As spatial encoding is realized by a selective low field region (a field-free-point, or field-free-line), this region has to be moved through the FOV on specific sampling trajectories. To achieve these trajectories complex time dependent magnetic fields are necessary. Due to the superposition of the selection field and the homogeneous time dependent fields, particles at different spatial positions experience different field sequences. As a result, the dynamic behaviour of those particles can be strongly spatially dependent. So far, simulation studies that determined the trajectory quality have used the Langevin function to model the particle response. This however, neglects the dynamic relaxation of the particles, which is highly affected by magnetic anisotropy. More sophisticated models based on stochastic differential equations that include these effects were only used for one dimensional excitation. In this work, a model based on stochastic differential equations is applied to two-dimensional trajectory field sequences, and the effects of these field sequences on the particle response are investigated. The results show that the signal of anisotropic particles is not based on particle parameters such as size and shape alone, but is also determined by the field sequence that a particle ensemble experiences at its spatial position. It is concluded, that the particle parameters can be optimized in terms of the used trajectory." @default.
• W2234498748 created "2016-06-24" @default.
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• W2234498748 date "2015-12-29" @default.
• W2234498748 modified "2023-10-07" @default.
• W2234498748 title "Trajectory dependent particle response for anisotropic mono domain particles in magnetic particle imaging" @default.
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• W2234498748 doi "https://doi.org/10.1088/0022-3727/49/4/045007" @default.
• W2234498748 hasPublicationYear "2015" @default.
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