Influence of the Receive Channel Number on the Spatial Resolution in Magnetic Particle Imaging

Magnetic Particle Imaging (MPI) is a fast and highly sensitive tomographic imaging modality. When applying 3D Lissajous imaging sequences, the region of interest is rapidly sampled by moving a field-free point along a predefined trajectory. Since the field excitation is done using three orthogonal excitation coils, usually also the magnetization response is measured with three independent and orthogonal receive coils. In this work the influence of selecting a subset of receive channels during reconstruction on the resulting image quality is analyzed. It is shown that using a single receive channel a slight loss of spatial resolution in the order of 12–22% in the direction perpendicular to the receiving direction can be observed while in direction of the receive coil the resolution is preserved and partially even improved. Since the construction of decoupled 3D receive coil units is a major engineering effort, the findings can be used to simplify the construction of 3D Lissajous type scanners.

[1]  Alan Edelman,et al.  Julia: A Fast Dynamic Language for Technical Computing , 2012, ArXiv.

[2]  B Gleich,et al.  Weighted iterative reconstruction for magnetic particle imaging , 2010, Physics in medicine and biology.

[3]  Bernhard Gleich,et al.  Tomographic imaging using the nonlinear response of magnetic particles , 2005, Nature.

[4]  Thorsten M Buzug,et al.  Efficient generation of a magnetic field-free line. , 2010, Medical physics.

[5]  Patrick W. Goodwill,et al.  The X-Space Formulation of the Magnetic Particle Imaging Process: 1-D Signal, Resolution, Bandwidth, SNR, SAR, and Magnetostimulation , 2010, IEEE Transactions on Medical Imaging.

[6]  Thorsten M. Buzug,et al.  Single-sided device for magnetic particle imaging , 2009 .

[7]  Patrick Vogel,et al.  Traveling Wave Magnetic Particle Imaging , 2014, IEEE Transactions on Medical Imaging.

[8]  Achiya Dax,et al.  On Row Relaxation Methods for Large Constrained Least Squares Problems , 1993, SIAM J. Sci. Comput..

[9]  B Gleich,et al.  Three-dimensional real-time in vivo magnetic particle imaging , 2009, Physics in medicine and biology.

[10]  Jochen Franke,et al.  System Characterization of a Highly Integrated Preclinical Hybrid MPI-MRI Scanner , 2016, IEEE Transactions on Medical Imaging.

[11]  T Knopp,et al.  Online reconstruction of 3D magnetic particle imaging data , 2016, Physics in medicine and biology.

[12]  Bernhard Gleich,et al.  Analysis of a 3-D System Function Measured for Magnetic Particle Imaging , 2012, IEEE Transactions on Medical Imaging.

[13]  Patrick W. Goodwill,et al.  Narrowband Magnetic Particle Imaging , 2009, IEEE Transactions on Medical Imaging.

[14]  B Gleich,et al.  Trajectory analysis for magnetic particle imaging , 2008, Physics in medicine and biology.

[15]  T. M. Buzug,et al.  Efficient Magnetic Gradient Field Generation With Arbitrary Axial Displacement for Magnetic Particle Imaging , 2012, IEEE Magnetics Letters.