在铁尘、石棉粉尘等环境下作业的工人,若吸入肺内并沉积于肺泡上的粉尘颗粒中含有强磁性物质(如 Fe_3O_4),则经过外磁场磁化后,可产生剩余磁场,用弱磁测量仪器可以探测出来。通常对于这些粉尘造成的职业病由 X射线“影象学”诊断,而肺磁法则通过测量肺磁强度进而推断肺内粉尘含量和分布,是一种“含量学”方法,这是一种国外少见、国内尚 In iron dust, asbestos dust and other work environment workers, if inhaled into the lungs and deposited on the alveolar dust particles containing ferromagnetic substances (such as Fe_3O_4), after the external magnetic field magnetization, the residual magnetic field can be generated, with a weak magnetic Measuring instruments can be detected. The occupational disease caused by these dusts is usually diagnosed by X-ray “imaging” and the lung magnetism rule is a “content” method by measuring the lung magnetism and thus inferring the lung’s dust content, which is a rare foreign , Domestic still