The main goal of the present study was estimation of an internal contamination of ¹³¹I among family members of patients treated with radioactive iodine. Thyroid activity measurements of ¹³¹I in examined volunteers were performed using a whole-body spectrometer at the institute of nuclear physics, Polish academy of sciences. During this research, 20 relatives of patients treated with ¹³¹I were examined: eight women and 12 men with an age in the range from 3 to 72 years. In the case of nine individuals, the activity of ¹³¹I in the thyroid was below the detection limit, but among the remaining 11 individuals, the activity varied from (9 ± 3) Bq up to (1140 ± 295) Bq. Subsequently, based on the measurements of thyroid ¹³¹I activities, the corresponding doses were assessed. The highest estimated effective dose reached 218 μSv, while the thyroid equivalent dose was 2.4 mSv. In addition, the experimental data obtained were statistically analysed together with the results of surveys of the individuals participating in the study by means of correspondence analysis and nonparametric tests: Mann–Whitney, gamma, χ² and Yule Phi coefficient. These analyses revealed relationships between ¹³¹I activities in the thyroids of the examined individuals and their housing conditions as well as consumption of meals prepared by the patients.

本研究的主要目标是估计接受放射性碘治疗的患者家属中^{131 I 的内部污染情况。}使用波兰科学院核物理研究所的全身光谱仪对受检志愿者进行¹³¹ I甲状腺活性测量。^{在这项研究中，接受131} I治疗的患者的 20 名亲属接受了检查：其中 8 名女性和 12 名男性，年龄在 3 岁至 72 岁之间。其中 9 人的甲状腺¹³¹ I 活性低于检测限，但其余 11 人的活性在 (9 ± 3) Bq 至 (1140 ± 295) Bq 之间变化。随后，根据甲状腺¹³¹ I 活性的测量，评估相应的剂量。最高估计有效剂量达到218μSv，而甲状腺等效剂量为2.4mSv。此外，通过对应分析和非参数检验，将获得的实验数据与参与研究的个体的调查结果一起进行统计分析：Mann-Whitney、gamma、χ ²和 Yule Phi 系数。这些分析揭示了受检者甲状腺中 ^{131 I 活性与其居住条件以及患者准备的膳食消耗之间的关系。}