König K, Wahl W, Rühm W, Burkart W
Institut für Strahlenhygiene, Bundesamt für Strahlenschutz, Oberschleissheim, Germany.
Radiat Environ Biophys. 1998 Apr;37(1):19-25. doi: 10.1007/s004110050087.
For 44 individuals living in areas of the Southern Urals with historical 90Sr contamination, whole-body activities of this radionuclide were investigated using a new mobile detection system. Beta-particles from 90Sr/90Y decay were measured in vivo via two proportional counters mounted in front of the forehead and above the head, respectively. In order to correct for absorption by the skin, scalp thickness was measured using ultrasonic techniques. Corrections are given with respect to self-absorption by the bone matrix and absorption by hair. A procedure is described to extrapolate from measured 90Sr activity of the skull bone to total 90Sr skeleton burden. As a result, 90Sr whole-body activities of up to 50 kBq were recorded in the selected cohort. For the same individuals, 90Sr was measured via the detection of bremsstrahlung using an established whole-body counting device. The overall results of both systems agree within 15%, but differences exceeding a factor of 2 were observed in some cases.
对于生活在南乌拉尔地区有历史90锶污染区域的44名个体，使用一种新型移动检测系统对该放射性核素的全身活度进行了研究。来自90锶/90钇衰变的β粒子通过分别安装在前额前方和头顶上方的两个正比计数器在体内进行测量。为了校正皮肤的吸收，使用超声技术测量头皮厚度。给出了针对骨基质自身吸收和头发吸收的校正。描述了一种从测量的颅骨90锶活度外推至全身90锶骨骼负荷的程序。结果，在选定队列中记录到高达50 kBq的90锶全身活度。对于相同个体，使用已建立的全身计数装置通过检测轫致辐射来测量90锶。两个系统的总体结果在15%以内相符，但在某些情况下观察到差异超过2倍。
