Analysis of the Linearity and Shift Invariance Characteristics of the X-Space Magnetic Particle Imaging

作者：Asl Hamed Jabbari; Kim Myeong Ok; Yoon Jungwon^*

来源：Journal of Nanoscience and Nanotechnology, 2016, 16(8): 8683-8686.

DOI：10.1166/jnn.2016.12514

• Magnetic Particle Imaging
• x-Space Reconstruction
• LSI
• Nanoparticles

The x-space reconstruction method for magnetic particle imaging (MPI) is a fast and robust method which provides the possibility for real-time imaging of the magnetic nanoparticle tracers. One limitation of this method is the requirement to utilize the complete MPI signal. The necessary filtering action in the MPI, removes the first harmonic information which affects the linearity and shift invariance (LSI) characteristics of the image. In this paper, LSI properties of the x-space imaging, necessary for medical diagnosis applications, is analyzed. It is shown that filtering the output signal causes an image loss which depends on the trajectory of the drive field where, for a harmonic drive field, its value is constant and can be compensated in 1D imaging. The findings of this paper reveal the importance of the method of applying the driving field in multidimensional x-space in order to keep the LSI properties.

• 出版日期2016-8