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All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
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Low blood levels of the thyroid hormones — triiodothyronine (T3) and thyroxine (T4) — signal the hypothalamus to release the thyrotropin-releasing hormone (TRH). TRH then reaches the pituitary gland and stimulates the release of thyroid-stimulating hormone(TSH) into the bloodstream.
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[Correlation analysis of low-dose X-ray ionizing radiation and thyroid function in radiation workers].

B F Lu1, W J Yin2, T Xu2

  • 1Department of Science and Education, Wuhan Prevention and Treatment Center for Occupational Diseases, Wuhan 430015, China Hubei Provincial Key Laboratory of Occupational Hazard Identification and Control, Wuhan University of Science and Technology, Wuhan 430070, China.

Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi = Zhonghua Laodong Weisheng Zhiyebing Zazhi = Chinese Journal of Industrial Hygiene and Occupational Diseases
|November 9, 2022
PubMed
Summary

Low-dose X-ray radiation exposure in workers is linked to changes in thyroid function, with higher cumulative doses increasing the risk of thyroid dysfunction, especially in older individuals.

Keywords:
Low-dose ionizing radiationRadiationThyroid functionX-rays

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Area of Science:

  • Endocrinology and Occupational Health
  • Radiation Biology and Environmental Health

Context:

  • Radiation workers in healthcare settings are routinely exposed to low-dose ionizing radiation.
  • Thyroid function is sensitive to radiation exposure, necessitating monitoring in occupational settings.

Purpose:

  • To evaluate the impact of low-dose X-ray ionizing radiation on thyroid function indicators in radiation workers.
  • To determine the correlation between cumulative radiation dose and thyroid function parameters.
  • To identify risk factors for thyroid dysfunction among radiation workers.

Summary:

  • A study of 1039 medical workers (518 radiation-exposed, 521 controls) found statistically significant differences in thyroid function indicators and a higher rate of thyroid dysfunction (8.49% vs. 4.80%) in the exposed group.
  • Linear regression revealed positive correlations between annual cumulative radiation dose and total thyroxine (TT(4)) and free thyroxine (FT(4)), and negative correlations with total triiodothyronine (TT(3)) and thyroid-stimulating hormone (TSH).
  • Binary logistic regression identified older age and higher annual cumulative radiation dose as significant risk factors for thyroid dysfunction.

Impact:

  • Findings indicate that cumulative low-dose X-ray radiation exposure affects thyroid function and increases dysfunction risk in radiation workers.
  • Highlights the importance of age and cumulative dose as key factors influencing thyroid health in occupational radiation exposure.
  • Supports the need for continued monitoring and protective measures for radiation workers to mitigate thyroid-related health risks.