Azeredo A M G F, Lourenço M C, Dantas A L A, Dantas B M
Instituto de Radioproteção e Dosimetria-CNEN, Av. salvador Allende, Rio de Janeiro, RJ 22780-160, Brazil.
Radiat Prot Dosimetry. 2003;105(1-4):483-5. doi: 10.1093/oxfordjournals.rpd.a006286.
The Whole Body Counter Facility (WBC) of IRD-CNEN in Brazil has been operating since 1986. The first system installed to perform in vivo measurements of low energy photon emitters radionuclides used Phoswich detectors. In 1998, the WBC unit was upgraded by the installation of an array of four low energy high purity germanium detectors. The performance and suitability of the detection system for lung measurements were evaluated by comparison with the annual dose limits and the detection limits obtained for 238U, 235U, 226Ra and 241Am. This evaluation determined whether the in vivo measurements are adequate. In order to compare the dose limit of 20 mSv y(-1), recommended by the International Commission on Radiological Protection (ICRP), with the in vivo monitoring technique, the minimum detectable intake (MDI) was calculated using the appropriate biokinetic models described in the ICRP Publications. The results were obtained for a single intake through inhalation. The AMAD considered was 5 microm.
巴西国家核能委员会辐射防护与剂量测定研究所的全身计数器设施（WBC）自1986年起投入运行。最初安装的用于对低能光子发射体放射性核素进行体内测量的系统采用了磷光体探测器。1998年，通过安装一组四个低能高纯锗探测器对WBC装置进行了升级。通过与年剂量限值以及针对238U、235U、226Ra和241Am获得的探测限进行比较，评估了该检测系统对肺部测量的性能和适用性。该评估确定了体内测量是否足够。为了将国际放射防护委员会（ICRP）推荐的20 mSv y(-1)剂量限值与体内监测技术进行比较，使用ICRP出版物中描述的适当生物动力学模型计算了最小可探测摄入量（MDI）。结果是通过单次吸入摄入获得的。所考虑的空气动力学等效直径为5微米。
