A Model of Magnetization and Relaxation of Ferrimagnetic Particles in the Lung
A Model of Magnetization and Relaxation of Ferrimagnetic Particles in the Lung
复制标题
肺中亚铁磁颗粒的磁化和弛豫模型
DOI：
10.1109/tbme.1982.324869
复制
发表时间：
1982
影响因子：
4.6
通讯作者：
I. Nemoto
中科院分区：
文献类型：
--
作者：
I. Nemoto
基于以往肺中Fe3O4颗粒的实验数据，建立了Fe3O4颗粒动力学行为的数学模型。该模型将肺中的磁化粒子视为流体介质中的永久磁偶极子，是经典顺磁性理论的扩展。虽然这个模型是基于简单的假设，但它给出的结果与观测到的现象很接近。用该模型解释我们的实验数据，可以估计出导致粒子取向随机化的能量约为10-18 j。我们估计周围介质的表观粘度约为100°N。s /平方米。模型计算和实验结果表明，颗粒取向的随机化过程是由肺泡巨噬细胞的一些细胞内过程引起的。
Based on the previous experimental data on Fe3O4 particles in the lungs, a mathematical model has been developed of the dynamic behavior of these particles. The model treats magnetized particles in the lungs as permanent magnetic dipoles in a fluid medium, and is an extension of the classical theory of paramagnetism. Although the model is based on simple assumptions, it gives results which approximate the observed phenomena. Interpretation of our experimental data with this model gives an estimate of the energy responsible for randomizing the orientations of particles of approximately 10-18 J. We estimate the apparent viscosity of the surrounding medium to be approximately 100°N . s/M2. The model calculation and experimental results indicate that the randomizing process of the particle orientations is caused by some intracellular processes in alveolar macrophages.