美国麻省理工学院Cohen教授研究肺磁场是用自己设计的通量门型磁变计,在胸廓外测定经外磁场作用后肺内磁化体的磁性。这种磁性反映肺内氧化铁粒的沉着量,经时测定,可以非侵袭地观察肺的排出能力。肺磁场经磁化后,会出现磁场急剧衰减现象,这种现象称为“宽松”。本来磁化后的磁力是不会变的,所以发生宽松是磁性粒子在细胞内发生了转移,与巨噬细胞的吞噬有关。测定肺磁可了解公路粉尘的肺内沉积情况。通过 Prof. Cohen of the Massachusetts Institute of Technology (MIT) studied the magnetic field of the lung by using its own flux gated magnetometer to measure the magnetism of the magnetized body in the lung after the external magnetic field. This magnetism reflects the deposition of iron oxide particles in the lungs, and can be observed non-invasively to observe the lung discharge ability over time. After the magnetic field of the lungs is magnetized, there will be a sharp decay of the magnetic field. This phenomenon is called “looseness”. The magnetic force after the magnetization is not changed, so loosening occurred when the magnetic particles migrated inside the cell, which was related to the phagocytosis of macrophages. Measuring lung magnetics can understand the intrapulmonary deposition of highway dust. by