Magnetic Particle Imaging is capable of three-dimensional real-time imaging. Due to high spatial and temporal resolution, the method offers a great potential to be used in interventional scenarios. In this contribution, a design study integrating a single-sided coil assembly into a patient table is presented. An elliptical and an approximated elliptical coil topology are compared and proposed as alternatives to the commonly used circular shaped coils. Through this, the size of the field of view can be extended while not exceeding the lateral width of the patient table.
Magnetic Particle Imaging (MPI) has been presented by Gleich and Weizenecker in 2005. Since then, a number of innovations have been introduced by many di erent research groups. In 2009, for instance, Sattel et al. presented a novel single-sided MPI scanner geometry. The major advantage of this particular scanner geometry is the unlimited measurement eld. For the imaging process in MPI, super-paramagnetic iron oxide nanoparticles (SPIONs) are applied as tracer material. The tracer is excited by sinusoidally varying magnetic elds. In this contribution, simulated magnetic elds were evaluated based on the measured eld distribution of a single-sided scanner realization. It is of particular importance to know the quality of the gradient elds, since image resolution in MPI is directly linked to the gradient strength.
In Magnetic Particle Imaging the spatial distribution of superparamagnetic iron-oxide nanoparticles is determined using oscillating magnetic fields. The change of particle magnetization is recorded with receive coils. Spatial encoding is achieved with a superimposed gradient field featuring a field-free point. Particles not located in the vicinity of this point are in saturation and therefore do not induce a signal in the coils. Image reconstruction based on a system matrix is accurate, but time consuming. Recently, a method was introduced that images several small patches instead of one large field of view. This contribution applies this approach and additionally suggests to reusing the system matrix of one patch for the reconstruction of all patches. We will motivate this idea with symmetry characteristics of the magnetic fields applied in Magnetic Particle Imaging and perform a simulation study on homogeneous as well as inhomogeneous fields to show the potential of the approach.