BS ISO 13304-1:2020 pdf free.Radiological protection - Minimum criteria for electron paramagnetic resonance (EPR) spectroscopy for retrospective dosimetry of ionizing radiation. BS ISO 13304-1 With conventional EPR spectrometers, the magnetic field and surveys should be made to confirm that this field is not exceeded where a person with a pacemaker could be positioned.Effects of modulation fields on tissues or tooth...