International Journal on Magnetic Particle Imaging IJMPI
Vol. 10 No. 1 Suppl 1 (2024): Int J Mag Part Imag

Proceedings Articles

Improving the Resolution of Single-harmonic MPI Using Perpendicular Signal Transformation

Main Article Content

Yidong Liao (Xidian University), Lei Li , Dawei Ge , Ning He , Pengyue Guo , Jiawei Hu , Chenxiao Xu , Yunpeng Gao , Zhonghao Zhang , Qibin Wang , Lingwen Hou , Kai Liu , Yu Zeng , Chenglong Shi , Man Luo , Yihan Wang , Shouping Zhu 


In single-harmonic magnetic particle imaging (MPI), image reconstruction is typically achieved through deconvolution using the point spread function (PSF) corresponding to the 3rd harmonic signal received parallel to the excitation field. In this study, we present an improved single-harmonic MPI reconstruction method. The method is based on transforming the 3rd harmonic signal received perpendicular to the excitation field. Experimental results demonstrated that our method, compared to the reconstruction using the raw original parallel 3rd harmonic signals and raw perpendicular 3rd harmonic signals, not only effectively improves resolution but also better recovers the shape contour of the phantom. Specifically, the proposed method achieves at least a 2-fold increase in resolution compared to the deconvolution reconstruction by the raw parallel 3rd harmonic signals.

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