Exposure to static magnetic fields in NMR research laboratories

To obtain cumulative exposure of workers to static magnetic fields in research laboratories, isotropic magnetic flux density values generated by MR spectrometers were integrated over time. One need only to consider that in a non medical environment, exposure limits are regulated only by international guidelines and by good practice, while in MR diagnostic environment there is a proper legislation. In this paper, the AA also introduced a weighting function, incorporating the international guidelines limits, and tested it with the Italian legislation existing for medical workers. The results were stored on a personal dose card, in order to evaluate the daily exposure of the worker and to better study the long term effects to static magnetic fields.