Xin Feng, Guang Jia, Jiaming Peng, Liyu Huang, Xiaofeng Liang, Haoran Zhang, Yanjun Liu, Bo Zhang, Yifei Zhang, Meng Sun, Peng Li, Qiguang Miao, Ying Wang, Li Xi, Kai Hu, Tanping Li, Hui Hui, Jie Tian
BACKGROUND: Magnetic nanoparticles (MNPs) are used as tracers without ionizing radiation in vascular imaging, molecular imaging, and neuroimaging. The relaxation mechanisms of magnetization in response to excitation magnetic fields are important features of MNPs. The basic relaxation mechanisms include internal rotation (Néel relaxation) and external physical rotation (Brownian relaxation). Accurate measurement of these relaxation times may provide high sensitivity for predicting MNP types and viscosity-based hydrodynamic states...
June 9, 2023: Medical Physics