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Cancer risks from medical radiation.

Elaine Ron1

  • 1Division of Cancer Epidemiology and Genetics, National Cancer Institute, EPS 7048, 6120 Executive Boulevard, Bethesda, MD 20892, USA. eron@mail.nih.gov

Health Physics
|July 11, 2003
PubMed
Summary

Medical radiation, including diagnostic imaging and radiotherapy, significantly contributes to public exposure. Studies show increased use and potential risks of radiation-related second cancers, particularly after high-dose treatments.

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Area of Science:

  • Medical Physics
  • Epidemiology
  • Oncology

Background:

  • Medical radiation constitutes a significant portion of artificial ionizing radiation exposure.
  • The use of diagnostic and therapeutic radiation has increased due to technological advancements and an aging population.
  • Epidemiologic data on medically irradiated populations complement existing studies on radiation effects.

Purpose of the Study:

  • To review the trends and health implications of medical radiation exposure.
  • To highlight the association between radiation therapy and secondary cancer risks.
  • To discuss the challenges in studying low-dose diagnostic radiation effects.

Main Methods:

  • Review of temporal trends in medical radiation use.
  • Analysis of epidemiologic data from medically irradiated populations.

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  • Examination of cancer risks following diagnostic and therapeutic radiation exposure.

    • Main Results:

    • Worldwide exposure from medical radiation is increasing, with diagnostic procedures being a major contributor.
    • High-dose radiotherapy, especially for childhood cancers, is linked to elevated risks of various secondary cancers.
    • Studies suggest increased cancer risks from historical diagnostic X-rays and specific radionuclide treatments like Thorotrast.

    Conclusions:

    • Medical radiation, both diagnostic and therapeutic, presents a growing public health consideration.
    • Understanding radiation-associated cancer risks is crucial for optimizing patient safety and treatment strategies.
    • Further research is needed to fully characterize the long-term effects of various medical radiation modalities.