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Endovascular brachytherapy: physics and technology

S Balter1

  • 1Lenox Hill Hospital, New York, New York 10021, USA.

Catheterization and Cardiovascular Diagnosis
|November 26, 1998
PubMed
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Endovascular brachytherapy uses radioactive sources for targeted radiation delivery. This study explores physics, technology, and delivery systems like radioactive stents and balloons for this cancer treatment.

Area of Science:

  • Medical Physics
  • Oncology
  • Biomedical Engineering

Background:

  • Brachytherapy involves placing radioactive sources near or within target tissues.
  • Endovascular brachytherapy is an emerging application for treating vascular diseases and cancers.

Purpose of the Study:

  • To introduce the fundamental physics and technology required for endovascular brachytherapy.
  • To review current and investigational delivery systems for endovascular brachytherapy.

Main Methods:

  • Discussion of three primary delivery systems: low activity radioactive stents, high activity solid sources, and high activity gas/liquid filled balloons.
  • Consideration of various radionuclides for each delivery system.
  • Analysis of radiation distribution characteristics for beta and gamma emitting sources.

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Main Results:

  • Different radionuclides exhibit distinct local and long-range radiation distribution patterns.
  • Devices range from permanently implanted microCi sources to temporarily inserted mCi sources.
  • Safe handling protocols are critical due to the potential danger of beta and gamma sources.

Conclusions:

  • Endovascular brachytherapy requires specialized physics and technology for effective implementation.
  • Multiple delivery systems and radionuclide choices are under investigation.
  • Understanding radiation physics and ensuring safe handling are paramount for successful clinical application.