Radioaktivitat mit dem Smartphone messen

摘要

The interest in the detection of radioactive materials has strongly increased after the accident in the nuclear power plant Fukushima and has led to a bottleneck of suitable measuring instruments. Smartphones equipped with a commercially available software tool could be used for dose rate measurements following a calibration according to the specific camera module. Aim: We examined whether such measurements provide reliable data for typical activities and radionuclides in nuclear medicine. Methods: For the nuclides ~(99m)Tc (10-1000 MBq), ~131I (3.7-1800 MBq, therapy capsule) and ~68Ga (50-600 MBq) radioactivity with defined geometry in different distances was measured. The smartphones Milestone Droid 1 (Motorola) and HTC Desire (HTC Corporation) were compared with the standard instruments AD6 (automess) and DoseGUARD (AEA Technology). Results: Measurements with the smartphones and the other devices show a good agreement: linear signal increase with rising activity and dose rate.