Improvement of Magnetic Field Induction for MPI Application Using Maxwell Coils Paired-Sub-coils System Arrangement

摘要

The development of excitation coil for Magnetic Particle Imaging (MPI) requires an adequate and homogeneous magnetic field induction to excite the magnetic nanoparticles (MNPs) located under the skin surface. The complex surface of human body and excitation coil physical properties can influence the magnetic field induction and homogeneity towards the MNPs. In this paper, several excitation coil designs with and without the combination of Maxwell coils pair were proposed. The simulation studies were performed to determine the magnetic field induction and homogeneity towards the targeted MNPs distance of 10-50 mm below the excitation coils using ANSYS Maxwell. The results show that the combination of several sub-coils with Maxwell coils pair can produce stronger magnetic field induction compared to the excitation coil used in conventional MPI system. Whereas, magnetic field induction for one single-coil with no Maxwell coils pair shows the weakest strength compared to other designs. The proposed excitation coil design can be used to enhance the MPI system performance for various medical applications.