This paper presents results of measurements of ^99mTc activity concentration in air and nuclear medical personnel blood during ventilation–perfusion SPECT lung scans. ^99mTc activity measurements were conducted at the Nuclear Medicine Department, John Paul II Hospital, Krakow. Technicians and nurses who perform examinations were equipped with personal aspirators enabling air sampling to determine the radiation exposure at their workplaces. Measurements allowed to evaluate the concentration of ^99mTc in 14 air samples and it ranged from 7800 ± 600 to 10,000 ± 1000 Bq m⁻³ for air samples collected by technicians and from 390 ± 30 to 600 ± 40 Bq m⁻³ for air samples collected by nurses. In addition ^99mTc concentrations in blood of medical personnel were determined in 24 samples. For technicians the maximum ^99mTc blood concentration levels reached 920 ± 70 Bq L⁻¹ and 1300 ± 100 Bq L⁻¹. In the case of nurses, the maximum estimated activity concentrations were about ten times lower, namely 71 ± 7 Bq L⁻¹ and 39 ± 3 Bq L⁻¹. Although the intakes appear to be relatively high, the resulting annual effective doses are about 34 µSv for technicians and only 2 µSv for nurses.

本文介绍了通气-灌注 SPECT 肺扫描期间空气和核医学人员血液中^99m Tc 活性浓度的测量结果。^99m Tc 活性测量是在克拉科夫约翰保罗二世医院核医学部进行的。进行检查的技术人员和护士都配备了个人吸气器，可以进行空气采样，以确定其工作场所的辐射暴露情况。测量允许评估的浓度^99米在14个空气样品Tc和它从7800±600介于10,000±1000贝米^-3用于通过技术人员和从390±30至600±40贝米收集的空气样品^-3用于空气样品由护士收集。另外^99m在 24 个样本中测定了医务人员血液中的 Tc 浓度。对于技术人员，最高^99m Tc 血液浓度水平达到 920 ± 70 Bq L ^-1和 1300 ± 100 Bq L ^-1。就护士而言，估计的最大活动浓度大约低十倍，即 71 ± 7 Bq L ^-1和 39 ± 3 Bq L ^-1。尽管摄入量似乎相对较高，但技术人员的年有效剂量约为 34 µSv，护士仅为 2 µSv。