图像分辨率
半最大全宽
磁粉成像
公制(单位)
点扩散函数
物理
分辨率(逻辑)
放松(心理学)
朗之万动力
趋同(经济学)
布里渊函数和朗之万函数
极限(数学)
光学
计算物理学
计算机科学
统计物理学
磁性纳米粒子
数学
数学分析
磁场
量子力学
人工智能
纳米颗粒
心理学
社会心理学
运营管理
磁化
经济
经济增长
作者
Tao Jiang,Wentong Yi,Zhongzhou Du,Wenzhong Liu
标识
DOI:10.1088/1361-6501/ac72fc
摘要
Abstract Spatial resolution is a key metric for characterizing magnetic particle imaging (MPI), and magnetic relaxation is a critical factor affecting the spatial resolution. This study investigates the point spread functions (PSFs) of MPI and analyzes the potential of breaking through the spatial resolution limit, which equals the full width at half maximum (FWHM) of the Langevin function derivative. In this work, different PSFs of MPI were built based on the magnitude and real and imaginary parts of complex susceptibility. The imaging performance was evaluated using the FWHM and a self-defined convergence parameter. The results show that image reconstruction can achieve a narrower PSF based on the imaginary part of complex susceptibility, and the heavy-tailed distribution of the derivative of the Langevin curve can be optimized. This suggests that there is scope to improve the spatial resolution and image contrast of MPI.
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