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Related Experiment Videos

A simple device for prostate and rectal localization in radiation therapy

S Kishel1, A K Ho, C H Sibata

  • 1Roswell Park Cancer Institute, Department of Radiation and Medicine, Buffalo, NY 14263, USA.

Medical Dosimetry : Official Journal of the American Association of Medical Dosimetrists
|January 1, 1995
PubMed
Summary

A novel rectal probe using dental wax, stone, silicone, barium, and aluminum was developed for precise prostate and rectum localization in radiation therapy. This device improves accuracy compared to existing methods, aiding in targeted radiation shielding.

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Area of Science:

  • Medical Physics
  • Radiation Oncology
  • Biomedical Engineering

Background:

  • Accurate prostate and rectum localization is crucial for effective radiation therapy planning.
  • Current localization techniques may lack precision or introduce artifacts.
  • There is a need for improved methods to delineate critical structures for radiation shielding.

Purpose of the Study:

  • To develop and evaluate a simple, effective rectal probe for prostate and rectum localization in radiation therapy.
  • To assess the accuracy of the developed probe in identifying key anatomical landmarks.
  • To compare the new probe's performance against existing localization techniques.

Main Methods:

  • Fabrication of a rectal probe using dental wax for initial molding.

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  • Creation of a two-piece mold using dental stone.
  • Manufacturing the probe from a silicone and barium mixture, with an attached aluminum plug.

    • Main Results:

    • Simulation films clearly identified the anterior rectal wall, anal sphincter, and anal verge.
    • CT scans with the probe showed minimal artifacts from the barium/silicone mixture.
    • The probe facilitated accurate prostate localization, outperforming barium injection and rectal markers.

    Conclusions:

    • The developed rectal probe is a simple and useful tool for precise prostate and rectum localization.
    • This device aids in accurate shielding of relevant regions during radiation therapy.
    • The probe offers improved accuracy over conventional rectal localization methods.