Evaluation of dose equivalent using a tissue-equivalent ionization chamber and a Geiger-Müller dosimeter

Summary When detailed neutron energy spectrum data are lacking for a mixed field of neutrons and photons, it is permissible when estimating the dose equivalent to assume that the quality factor for the neutrons is 10. With this assumption, it is shown that the responses of a tissue-equivalent ionization chamber and a Geiger-Müller dosimeter can be used to obtain an acceptable approximation of the dose equivalent in the mixed field without requiring precise knowledge of the relative neutron sensitivity of the Geiger-Müller dosimeter.This investigation was supported by Contract EP-78-S-02-4733 from the Department of Energy to the Radiological Research Laboratory/Department of Radiology and by Grant No. CA13696 to the Cancer Center/Institute of Cancer Research, awarded by National Cancer Institute, DHEW     

Personal dosimetry of exposure to mobile telephone base stations? An epidemiologic feasibility study comparing the Maschek dosimeter prototype and the Antennessa DSP‐090 system

The aim of our study was to test the feasibility and reliability of personal dosimetry. Twenty-four hour exposure assessment was carried out in 42 children, 57 adolescents, and 64 adults using the Maschek dosimeter prototype. Self-reported exposure to mobile phone frequencies were compared with the dosimetry results. In addition, dosimetry readings of the Maschek device and those of the Antennessa DSP-090 were compared in 40 subjects. Self-reported exposures were not associated with dosimetry readings. The measurement results of the two dosimeters were in moderate agreement (r(Spearman) = 0.35; P = .03). Personal dosimetry for exposure to mobile phone base station might be feasible in epidemiologic studies. However, the consistency seems to be moderate.